GAS TURBINE ENGINE COMPONENTS AND COOLING CAVITIES

Abstract

The present disclosure relates to gas turbine engine components including cooling cavities. One embodiment is directed to a component including a forward surface, an aft surface, at least one inlet on the forward surface and a cavity between the forward surface and the aft surface. The cavity is configured to receive airflow from at least one inlet to provide cooling flow for the component. The cavity includes a plurality of structures within the cavity. The component also includes at least one exit between the forward surface and the aft surface. The plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit. The component having a cavity may be employed by a combustor of a gas turbine engine.

Description

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Patent Application No. 62/095,529 filed on Dec. 22, 2014, the entire contents of which are incorporated herein by reference thereto.

FIELD

The present disclosure relates to components of a gas turbine engine and, in particular, a component having a cooling cavity.

BACKGROUND

Gas turbine engine combustors are required to operate efficiently during engine operation and flight. Combustors are locations of tremendous amounts of heat. Combustors also experienced a high degree of heat and distress. High heat exposure to the combustor may cause loss of protective thermal barrier coating which leads to exposure to a hot gas environment. This, in turn, leads to deformities of the combustor which have an adverse effect on cooling airflow and back side heat transfer coefficients. Film cooling alone may not remedy this situation and may worsen the condition due to the addition of more air (and oxygen) which could increase combustion temperature.

Accordingly, it is desirable to provide components which minimize or limit heat exposure causing deformities and maximizing cooling airflow within a gas turbine engine.

BRIEF SUMMARY OF THE EMBODIMENTS

Disclosed and claimed herein are components for a gas turbine engine. One embodiment is directed to a component including a cooling cavity. The component includes a forward surface, an aft surface, and at least one inlet on the forward surface, the at least one inlet configured to receive air flow. The component includes a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity. The component includes at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity, wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

In one embodiment, the forward surface is a cold side of a combustor bulkhead, and the aft surface is the hot side of the combustor bulkhead.

In one embodiment, the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

In one embodiment, the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

In one embodiment, the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

In one embodiment, the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

In one embodiment, the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

In one embodiment, the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

In one embodiment, component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

In one embodiment, at least a first portion of the plurality of structures are configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.

Another embodiment is directed to a combustor of a gas turbine engine. The combustor includes a combustor shell, wherein the shell is configured to engage bulkhead and a bulkhead. The bulkhead includes a plurality of bulkhead panels. Each bulkhead panel includes a forward surface, an aft surface, and at least one inlet on the forward surface, the at least one inlet configured to receive air flow. Each bulkhead panel includes a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity. Each bulkhead panel includes at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity, wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

In one embodiment, the forward surface is a cold side of a bulkhead panel, and the aft surface is the hot side of said bulkhead panel.

In one embodiment, the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

In one embodiment, the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

In one embodiment, the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

In one embodiment, the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

In one embodiment, the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

In one embodiment, the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

In one embodiment, component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

In one embodiment, at least a first portion of the plurality of structures are configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.

In one embodiment, a gas turbine engine component including a cooling cavity is provided. The component having: a forward surface; an aft surface; at least one inlet on the forward surface, the at least one inlet configured to receive air flow; a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity; and at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity, wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the forward surface is a cold side of a combustor bulkhead, and the aft surface is the hot side of the combustor bulkhead.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, at least a first portion of the plurality of structures is configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.

In yet another embodiment, a combustor of a gas turbine engine is provided. The combustor having: a combustor shell, wherein the shell is configured to engage bulkhead; and a bulkhead including: a plurality of bulkhead panels, wherein each bulkhead panel includes a forward surface; an aft surface; at least one inlet on the forward surface, the at least one inlet configured to receive air flow; a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity; and at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity, wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the forward surface is a cold side of a bulkhead panel, and the aft surface is the hot side of said bulkhead panel.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, the component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

In addition to one or more of the features described above, or as an alternative to any of the foregoing embodiments, at least a first portion of the plurality of structures are configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.

Other aspects, features, and techniques will be apparent to one skilled in the relevant art in view of the following detailed description of the embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The features, objects, and advantages of the present disclosure will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout and wherein:

FIG. 1 depicts a graphical representation of a gas turbine engine according to one or more embodiments;

FIGS. 2A-2C depict graphical representations of a component according to one or more embodiments;

FIGS. 2D-2E depict structures of a component according to one or more embodiments; and

FIGS. 3A-3B depict graphical representations of a bulkhead according to one or more embodiments.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

Overview and Terminology

One aspect of this disclosure relates to components of a gas turbine engine, and in particular components with cooling cavities. One or more structural configurations are provided for components to allow for cooling with a cavity or plenum of the component. The cavity position and structures may allow for particular areas within a gas turbine engine or high temperature environment to receive cooling flow. According to another embodiment, configurations are provided to meter airflow and maintain cooling efficiency within a cavity of a component, such as a bulkhead.

According to another embodiment, configurations are provided for components, such as combustors of gas turbine engines. By way of example, a combustor including a combustor shell may include one or more cavities in the bulkhead or bulkhead panels of the combustor. Although components are described as bulkhead components, it should be appreciated that the principles may apply to other components.

A cavity as used herein related to an area or plenum within a structural component. In the context of a bulkhead, the cavity is in between the forward and aft surfaces of the bulkhead.

As used herein, the terms “a” or “an” shall mean one or more than one. The term “plurality” shall mean two or more than two. The term “another” is defined as a second or more. The terms “including” and/or “having” are open ended (e.g., comprising). The term “or” as used herein is to be interpreted as inclusive or meaning any one or any combination. Therefore, “A, B or C” means “any of the following: A; B; C; A and B; A and C; B and C; A, B and C”. An exception to this definition will occur only when a combination of elements, functions, steps or acts are in some way inherently mutually exclusive.

Reference throughout this document to “one embodiment,” “certain embodiments,” “an embodiment,” or similar term means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of such phrases in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner on one or more embodiments without limitation.

Exemplary Embodiments

Referring now to the figures, FIG. 1 depicts a graphical representation of a gas turbine engine 100 according to one or more embodiments. A cross-sectional representation is provided for components of gas turbine engine 100. Gas turbine engine 100 includes a combustor 105 which may include one or more combustor shells, such as combustor shell 110. Components of a gas turbine engine, such as combustor 105 combustor shell 110, and gas turbine engine components in general, may be configured to include one or more features to allow for cooling. According to one embodiment, structural configurations are provided for cavities to allow for cooling, and in particular, providing components with a cavity including one or more structural elements within the cavity to meter air flow within the cavity. According to an exemplary embodiment, and as described herein, a cooling cavity may be employed by components of a hot section of gas turbine engine 100, such as combustor 105. It should be appreciated though, that a cooling cavity, and components including a cavity with structural elements as described herein, may be employed with other types of components and non-gas turbine engine components in general.

Combustor 105 of FIG. 1 includes combustor shell 110. Combustor 105 may include a plurality of combustion chambers or shells, such as combustor shell 110. Combustor shell 110 receives fuel injector 120 and provides an area for combustion of fuel and gases within the shell. Accordingly, portions of combustor shell 110 are exposed to high temperatures which can lead to distress. Film cooling may be applied to portions of combustor shell 110, however, portions of the combustor shell may experience more stress than others. By way of example, bulkhead 115 of combustor shell 110 may experience distress and possibly wear due to inadequate film cooling. Configurations including a cavity as described herein may provide additional cooling to one or more regions of a component that experience higher levels of distress and wear.

Bulkhead 115 is depicted as a an annular component including an outer circumferential surface, such as outer rail 116, inner circumferential surface, such as inner rail 117 and opening 118. Bulkhead 115 may be the bulkhead for combustor shell 110.

Gas turbine engine 100 may include a plurality of combustors and/or combustor shells 110. Gas turbine engine 100 may direct airflow, shown as airflow 125 towards combustor 105 and in particular combustor shell 110. Output airflow of combustor shell 110 is shown as airflow 130. According to one embodiment, a component of a gas turbine engine, such as bulkhead 115 may include one or more inlets to received airflow, such as air flow 125. According to one embodiment, the inlets may be on a forward surface, shown as 135, of bulkhead 115. The component may have an aft surface, shown as 140. The component, such as bulkhead 115 may include a cavity between forward surface 135 (cold side) and aft surface 140 (hot side).

Referring now to FIGS. 2A-2E, FIGS. 2A-2C depict graphical representations of a component according to one or more embodiments. FIGS. 2D-2E depict structures of the component according to one or more embodiments.

FIG. 2A depicts a representation of a component 200. According to one embodiment, component 200 may be a component of a gas turbine engine (e.g., gas turbine engine 100), such as a bulkhead (e.g., bulkhead 115). As such, component 200 may relate to a section or panel of a bulkhead, such as a bulkhead panel or the bulkhead itself. In certain embodiments, component 200 may be part of an annular component, such as an annular bulkhead, and annular components in general.

Acceding to one embodiment, component 200 includes a cavity 205 which may be a cooling cavity for component 200. Component 200 includes one or more inlets for cavity 205, such as inlets 210 configured to receive airflow 215 (e.g., airflow 125). Cavity 205 provides a passageway for air flow 215 to cool the component, including the forward and aft surfaces of the component, in the area associated with the cavity. Cavity 205 also allows airflow within the cavity to exit as shown by 216 via one or more of exits 211. Cavity 205 may occupy a portion of the component 205. Components may include multiple cavities per component.

Component 200 includes forward surface 220 which can include at least one inlet 210. Component also includes an aft surface (represented as 240). Air directed to and/or flowing toward forward surface 220, such as airflow directed to a combustor of a gas turbine engine, may be received by inlets 210. Component 200 includes at least one exit 211 between the forward surface 220 and the aft surface 240. The at least one exit 211 may be configured to allow airflow within the cavity 205 to exit the cavity. According to one embodiment, exits 211 are offset or displaced from inlets 210. Exits 211 may be cavity exits and may be positioned along the edge of component 200 and such that exits 211 are displaced from the at least one inlet 210.

The position of cavity 205 may be based on areas of component 200 that need additional cooling. In the context of a gas turbine engine component and in particular a bulkhead, cavity 205 may be associated with positions of a bulkhead or bulkhead panel that need additional cooling. Component 200 may be a structure including one or more edges, and cavity 205 may be positioned proximate to an edge of the component. Component 200 may optionally include opening 225 (e.g., opening 118) such as a fuel injector opening. In certain embodiments, cavity 205 may be positioned relative to opening 225. By way of example, opening 225 may be an opening for fuel injector, such that distress in the component 200 due to combustion from the fuel injector may be modeled and/or determined. Cavity 205 may be associated with locations of distress for component 200. According to another embodiment, cavity 205 may be position between rails 230 (e.g., outer circumferential edge) and rail 235 (e.g., inner circumferential edge) of the component 200.

Cavity 205 may be provided between the forward surface 220 and the aft surface 240. Cavity 205 may be configured to receive airflow 215 from the at least one inlet 210 to provide cooling flow for the component 200 and wherein the cavity 205 includes a plurality of structures within the cavity. As will be described in more detail below, component 200 may include one or more structures internal to the cavity 205. In certain embodiments, cavity 205 may be formed by a refractory metal core, such that structures are formed within the cavity during a casting or manufacturing process of component 200. Cavity 205 may be a plenum, such as a plenum cooling space formed by a refractory metal core during a casting or formation process.

According to certain embodiments, component 200 may interface with one or more similar components (e.g., panels). FIG. 2B depicts a configuration of component 200 with cavity 205 relative to component 201 with cavity 206. Component 200 is configured to interface with a second component, component 201, and a plurality of structures associated with the exit of the component 200 may be offset from a plurality of structures associated with an exit of the second component 201. Components 200 and 201 may be bulkhead panels, for example. According to one embodiment, components 200 and 201 may include cavities 205 and 206, respectively to provide cooling. Airflow exits of components 200 and 201 are shown as 216 and 217, respectively. According to one embodiment, structures within cavities 205 and 206 may be arranged to allow for airflows 216 and 217 to efficiently exit. For example, structures within cavities 205 and 206 may be configured to stagger the exit points of airflows 216 and 217.

FIG. 2C depicts structures of cavities 205 and 206 according to one or more embodiments. Each cavity may include a plurality of structures. FIG. 2C depicts an exemplary representation (cut-away view) of structures for each of cavities 205 and 206.

Cavity 205 includes a plurality of structures, shown as structures 250 and 255 configured to meter airflow within cavity 205. Cavity 205 may receive airflow form inlets 210. Airflow within cavity 205 is shown as 245. Airflow 245 then exits cavity 205 and is shown as 216 relative to exits 211. Structures 250 and 255 of cavity 205 may be cylindrical pillars position in order to meter flow. Structures 250 are configured to meter air flow by directing airflow within cavity 205 based on one or more of structure spacing, structure size, structure shape, and structure pattern. Structures 255 operate similar to structures 250. Structures 255 are at least one of a cylindrical and oblong shape. Structures 255 are positioned near an exit area of cavity 205. According to one embodiment structures 255 may be shaped to control airflow 216 that exits cavity 205.

Cavity 206 includes a plurality of structures, shown as structures 251 and 256 configured to meter airflow within cavity 206. Structures 251 and 256 of cavity 206 may operate similarly to structures of cavity 205. Cavity 206 may receive airflow from inlets 210 and airflow within cavity 206 is shown as 246. Airflow 246 then exits cavity 206 and is shown as 217 relative to exits of cavity 206. Structures 251 and 256 of cavity 206 may be cylindrical pillars position in order to meter flow. According to another embodiment structures 255 of cavity 205 may be positioned in an alternating location with structures 256 of cavity 206.

FIG. 2D depicts a representation of structures within a cavity according to one or more embodiments. Structures 250 may be configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit. Cooling flow 265 may be based on airflow received by inlets for a cavity. One embodiment is directed to providing an arrangement of structures to maintain the ability of cooling flow 265 within a cavity such that air flow 267 exiting cavity may cool the component. According to one embodiment, structures 250 may be arranged in sections. Structures 250 may also be arranged in rows or formations. FIG. 2D depicts an exemplary division 266 separating structures into first portion 268 and second portion 269. By arranging structures to maintain cooling efficiency, cooling flow 270 near the exit of the cavity may retain the ability to provide cooling effectiveness for the component. In that fashion, structures 250 are configured to meter airflow within a cavity and to provide a cooling effectiveness that increases towards a rail or exit of the cavity, such that cooling effectiveness is the capacity to cool a portion of component.

FIG. 2E depicts a graphical representation of structures 250 within a cavity of a component. According to one embodiment and regarding cooling provided by structures, a portion of the structures may be associated with providing high efficiency cooling, and a portion of the structures within the cavity may be configured to provide high effectiveness. Structures 250 maintain cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity. Structures may also be configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity. For example, a first portion of structures may be configured to provide higher cooling efficiency and a second portion of the plurality of structures may be configured to provide a higher cooling effectiveness.

Structures 250 may be arranged such that a portion of the structures (e.g., rows 1-3) provide cooling with higher efficiency, shown as 280. According to another embodiment, Structures 250 may be arranged such that a portion of the structures (e.g., rows 4-6) provide cooling with higher effectiveness, shown as 287. Structures 250 associated with section 280 may be populated more densely, compared to the arrangement of structures in section 287 to provide effective and efficient heat transfer. In that fashion, the air flow may be controlled within a cavity.

FIGS. 3A-3B depict graphical representations of a bulkhead according to one or more embodiments. According to one embodiment, bulkhead 300 may include one or more cavities to provide cooling. FIG. 3A depicts a forward surface 301 of bulkhead 300. Bulkhead 300 may be an annular structure. Bulkhead 300 may include a plurality of bulkhead panels 305_1-n. Bulkhead 300 may be associated with the bulkhead of a combustor shell of a gas turbine engine (e.g., gas turbine engine 100). Bulkhead 300 is represented as an annular bulkhead including a plurality of combustor panels 305_1-n. Bulkhead 300 and panels 305_1-n may be arranged around a rotating axial shaft in opening 316 of gas turbine engine.

FIG. 3A depicts inlets 310 which may be configured to receive air flow for a cavity within a panel of bulkhead 300. Inlets 310 are shown near the edge of bulkhead 300. The position of inlets 310 may be associated with the position of cavities within panels 305_1-n. The position of inlets 310 may be exemplary. Inlets of bulkhead 300 may be positioned in other portions of panels 305. Exemplary inlet positions, which are optional, for bulkhead 300 are shown as 311. Surface 301 may be a forward surface of the bulkhead 300. Bulkhead 300 is shown with openings 320 for fuel injectors, with inner circumferential rail 315, panel rail 325 between bulkhead panels, opening 316, and outer circumferential rail 330.

FIG. 3B depicts an aft or back surface 302 of bulkhead 300. Bulkhead 300 may include one or more cavities between forward surface 301 and aft surface 302. Exemplary positions for cavities are shown as 335 and 340 for bulkhead 300. These locations may be areas that may be susceptible to distress and/or wear within a combustor shell. However, it should be appreciated that these areas are exemplary, and that cavities may be position in other locations of bulkhead 300. Positions 335 relate to positions along an outer circumferential rail 330. Positions 340 relate to positions between panels and associated with panel rails 325. When cavities are associated with positions between panels, such as panel rails 325, the structural elements of adjoining panels may be offset within the cavities to allow for alternating exits paths of airflow.

While this disclosure has been particularly shown and described with references to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the scope of the claimed embodiments.

Claims

1. A gas turbine engine component including a cooling cavity, the component comprising:

a forward surface;

an aft surface;

at least one inlet on the forward surface, the at least one inlet configured to receive air flow;

a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity; and

at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity,

wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

2. The component of claim 1, wherein the forward surface is a cold side of a combustor bulkhead, and the aft surface is the hot side of the combustor bulkhead.

3. The component of claim 1, wherein the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

4. The component of claim 1, wherein the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

5. The component of claim 4, wherein the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

6. The component of claim 1, wherein the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

7. The component of claim 1, wherein the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

8. The component of claim 1, wherein the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

9. The component of claim 1, wherein component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

10. The component of claim 1, wherein at least a first portion of the plurality of structures are configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.

11. A combustor of a gas turbine engine comprising:

a combustor shell, wherein the shell is configured to engage bulkhead; and

a bulkhead including: a plurality of bulkhead panels, wherein each bulkhead panel includes a forward surface; an aft surface; at least one inlet on the forward surface, the at least one inlet configured to receive air flow; a cavity between the forward surface and the aft surface, wherein the cavity is configured to receive airflow from the at least one inlet to provide cooling flow for the component and wherein the cavity includes a plurality of structures within the cavity; and at least one exit between the forward surface and the aft surface, the at least one exit configured to allow airflow to exit the cavity, wherein the plurality of structures are configured to meter air flow within the cavity and to maintain the cooling effectiveness of air flow within the cavity from the at least one inlet to the at least one exit.

12. The combustor of claim 11, wherein the forward surface is a cold side of a bulkhead panel, and the aft surface is the hot side of said bulkhead panel.

13. The combustor of claim 11, wherein the at least one inlet is configured to receive airflow directed to a combustor of a gas turbine engine.

14. The combustor of claim 11, wherein the component is a structure including one or more edges, and wherein the cavity is positioned proximate to an edge of the component.

15. The combustor of claim 14, wherein the at least one exit is a cavity exit, and wherein the at least one exit is positioned along the edge of the component and displaced from the at least one inlet.

16. The combustor of claim 11, wherein the plurality of structures are configured to meter air flow by directing airflow within the cavity based on one or more of structure spacing, structure size, structure shape, and structure pattern.

17. The combustor of claim 11, wherein the plurality of structures maintains cooling effectiveness of airflow by allowing greater flow within a first portion of the cavity and reduced flow in a second portion of the cavity, wherein the second portion of the cavity is associated with the at least one exit of the cavity.

18. The combustor of claim 11, wherein the plurality of structures are configured to provide a cooling efficiency that increases as the airflow traverses the cavity, wherein cooling efficiency is a measure of heat pickup by airflow within the cavity.

19. The combustor of claim 11, wherein component is configured to interface with a second component, and a plurality of structures associated with the exit of the component are offset from a plurality of structures associated with an exit of the second component.

20. The combustor of claim 11, wherein at least a first portion of the plurality of structures are configured to provide higher cooling efficiency and a second portion of the plurality of structures are configured to provide a higher cooling effectiveness.