Abstract: A method of operating a clearance control system for a gas turbine engine, includes estimating, in a control module, thermal expansion values of engine components based at least partially on an exhaust gas temperature of the gas turbine engine, determining an estimated clearance value based on the thermal expansion values and ducting airflow for cooling the engine components.

Abstract: Provided herein are an austenite steel that satisfies desirable strength and desirable castability at the same time, and an austenite steel casting using same. The austenite steel according to an embodiment of the present invention contains Ni: 25 to 50%, Nb: 3.8 to 6.0%, Zr: 0.5% or less, B: 0.001 to 0.05%, Cr: 12 to 25%, Ti: 1.6% or less, Mo: 4.8% or less, and W: 5.2% or less in mass %, and the balance Fe and unavoidable impurities, wherein the parameter Ps represented by the following formula (1) satisfies Ps?38, Ps=8.3[Nb]?7.5[Ti]+2.4[Mo]+3.5[W]??formula (1), where [Nb], [Ti], [Mo], and [W] represent the contents of Nb, Ti, Mo, and W, respectively, in mass %.

Abstract: An apparatus and method of cooling a hot portion of a gas turbine engine, such as a rotor disk, by having a vane assembly with a cooling air passage and a flow control insert located within the cooling air passage defining a conduit. A turning nozzle is mounted to the vane and has a turning passage with an inlet and an outlet, the turning nozzle is fluidly coupled to the flow control insert outlet.

Abstract: Embodiments of a heat exchanger for turbine engines are provided herein. In some embodiments, a heat exchanger for a turbine engine may include a body configured to be disposed proximate and at least partially surrounding a heat source, wherein the body defines a cavity configured to capture a heated fluid expelled from the heat source; and a channel formed in the body, the channel fluidly coupled to a heat sink.

Abstract: A self-contained lubrication fluid circulation system for use with a gas turbine engine defining a core air flowpath includes a sump configured to collect lubrication fluid and a heat source coupled in fluid communication with the sump and configured to transfer heat to the lubrication fluid. The system also includes a heat sink positioned within the sump and coupled in fluid communication with the heat source. A lubrication fluid conduit of the system is configured to channel the lubrication fluid between the heat source and the heat sink, wherein the lubrication fluid conduit is positioned entirely within the sump.

Abstract: A gas accumulation detection and ventilation system for a gas turbine enclosure includes a pipe array positioned adjacent a floor of the gas turbine enclosure and a ventilation assembly including a fan, an air flow inlet and an air flow outlet. The pipe array includes at least one pipe having at least one opening therein. The fan of the ventilation assembly directs an air flow sweep through the air flow inlet along the floor of the gas turbine enclosure.

Abstract: A turbine assembly having an outer casing (36), an inner structural ring (38), and an annular gas path (42) defined between outer and inner flow path walls (44, 46) for conducting a gas flow through the turbine assembly. A plurality of structural struts (52) are spaced apart in a circumferential direction, each strut (52) including a strut body (52a) extending in a radial direction for supporting the inner structural ring (38) to the outer casing (36). A first strut end (64) at a radially outer end of the strut body (52a) is detachably attached to the outer casing (36) with a first fastener structure (68) engaging the outer casing (36), and a second strut end (66) at a radially inner end of the strut body (52a) is detachably attached to the inner structural ring (38) with a second fastener structure (70) engaging the inner structural ring (38).

Abstract: A tension fuse assembly includes an elongate tubular member, and catcher rod. The tubular member has first end portion and an opposite second end portion, and fuse portion is positioned between the first end portion and second end portion. A cross-sectional area of the tubular member is reduced at the fuse portion. The catcher rod has first end portion and an opposite second end portion, with catcher rod being accommodated concentrically within the tubular member. The second end portion of the catcher rod is secured to second end portion of the tubular member. The first end portion of the tubular member is provided with first divergent conical portion, and first end portion of catcher rod is provided with second divergent conical portion. In the event of breakage of tubular member, second divergent conical portion impinges against first divergent conical portion to limit the axial movement of the tubular member.

Abstract: An exhaust gas diffuser (38) including: a radially-outer peripheral casing (46); a hub (42) located within said radially-outer peripheral casing and coaxial with a center axis (40) of the casing; main struts (44) located at circumferentially-spaced locations about the hub and extending radially-outwardly to the radially outer peripheral casing; and small struts (52) located at circumferentially-spaced locations between the main struts; wherein the main struts and small struts have substantially parallel longitudinal chord lines and each of the small struts have a cross-sectional area smaller than a cross-sectional area of the main struts.

Abstract: A closed loop steam engine that transfers its motive power to a flow of water using a steam injector. The resulting water jet then drives a turbine, is cooled in a heat exchanger to extract useful heat and then return to the steam injector water inlet. Part of the flow of water is reused as feed water to the boiler.

Abstract: A system is provided for heat energy recovery in a vehicle including an internal combustion engine, such as a diesel engine, and a corresponding method is provided for operating such a system.

Abstract: A volumetric expander (20) configured to transfer a working fluid and generate useful work includes a housing. The housing includes an inlet port (24) configured to admit relatively high-pressure working fluid and an outlet port (26) configured to discharge to a relatively low-pressure working fluid. The expander also includes first and second twisted meshed rotors (30,32) rotatably disposed in the housing and configured to exp/and the relatively high-pressure working fluid into the relatively low-pressure working fluid. Each rotor has a plurality of lobes, and when one lobe of the first rotor is leading with respect to the inlet port, one lobe of the second rotor is trailing with respect to the inlet port. The expander additionally includes an output shaft (38) rotated by the relatively high-pressure working fluid as the fluid undergoes expansion. A system for generating work using the expander in a Rankine cycle is also disclosed.

Abstract: A heat engine system and a method for cooling a fluid stream in thermal communication with the heat engine system are provided. The heat engine system may include a working fluid circuit configured to flow a working fluid therethrough, and a cooling circuit in fluid communication with the working fluid circuit and configured to flow the working fluid therethrough. The cooling circuit may include an evaporator in fluid communication with the working fluid circuit and configured to be in fluid communication with the fluid stream. The evaporator may be further configured to receive a second portion of the working fluid from the working fluid circuit and to transfer thermal energy from the fluid stream to the second portion of the working fluid.

Abstract: A camshaft may include a tube-like outer shaft and an inner shaft arranged coaxially thereto and at least partially rotatable with respect to the outer shaft. The inner shaft may have an end section with a reduced external diameter. The inner shaft may be sealed with respect to the outer shaft at the end section.

Abstract: The cam follower roller device provides a tappet body 12, an insert 18 mounted in the tappet body and provided with a central core 24 and with at least two side tabs 26, 28, a pin 14 mounted at least on the tabs of the insert, and a roller 16 mounted on the pin. The insert 18 further provides at least one stiffener 44, 46 disposed between the core 24 and each tab 26, 28.

Abstract: A camshaft phaser includes an input member and an output member defining an advance chamber and a retard chamber; a valve spool moveable along an axis between an advance position and a retard position and having a valve spool bore with a phasing volume and a venting volume defined therein such that the phasing volume is fluidly segregated from the venting volume, the valve spool having a first spool supply passage and a second spool supply passage which is diametrically opposed to the first spool recirculation passage. The first spool supply passage and the second spool supply passage each provide a path for pressurized oil to be supplied to the phasing volume from an oil source.

Abstract: A camshaft phaser includes an input member and an output member defining an advance chamber and a retard chamber; a valve spool moveable along an axis between an advance position and a retard position and having a valve spool bore with a phasing volume and a venting volume defined therein such that the phasing volume is fluidly segregated from the venting volume, the valve spool having a first spool recirculation passage and a second spool recirculation passage which is diametrically opposed to the first spool recirculation passage. The first spool recirculation passage and the second spool recirculation passage provide paths for oil to flow from the advance chamber or the retard chamber to the phasing volume depending on the position of the valve spool.

Abstract: A camshaft adjusting device, including a vane cell adjuster having a stator connectable to a crankshaft and a rotor, which is rotatably supported in the stator and connectable to a camshaft. Webs on the stator, divide an annular space between the stator and the rotor into pressure chambers, wherein the rotor has a rotor hub and vanes extending radially outward from the rotor hub, which vanes divide the pressure chambers into two groups of working chambers having a different acting direction, into each of which working chambers pressure medium flowing in or out in a pressure-medium circuit can be admitted, and a central locking device for locking the rotor in relation to the stator.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an engine; a driven side rotor disposed coaxially with the driving side rotor and synchronously rotating with a camshaft in the internal combustion engine; a fluid pressure chamber formed on at least one of the driving side and driven side rotors, and partitioned into advance angle and retard angle chambers; a bolt disposed coaxially with a rotary axis of the driven side rotor, connecting the driven side rotor and the camshaft, and including a cylindrical portion coaxial with the rotary axis; and a partition body including a press-fit portion press-fitted into the cylindrical portion, and partitioning the cylindrical portion into first and second flow passages for use for feeding and discharging working fluid to and from the fluid pressure chamber, wherein the press-fit portion is provided with a cutting portion.

Abstract: A valve opening and closing timing control apparatus includes: a driving side rotor synchronously rotating with a crankshaft of an engine; a driven side rotor disposed at a coaxial core with a rotary shaft core of the driving side rotor and integrally rotating with a camshaft for a valve opening and closing; a connecting bolt disposed at the coaxial core with the rotary shaft core to connect the driven side rotor to the camshaft, and on which an advance angle port and a retard angle port are formed on an outer peripheral surface; and a spool disposed in a spool chamber of the inside of the connecting bolt, and controlling the feeding and discharging of working fluid to the advance angle port or the retard angle port from a pump port formed on the connecting bolt.

Abstract: The invention realties to a hydraulic valve for phaser. In the hydraulic valve according to the invention a seal element is arranged so that a risk of a transition of oil from an oil cycle or a lubricant cycle of an internal combustion engine or a risk of hydraulic fluid from the hydraulic valve entering a coil of an actuator is avoided.

Abstract: Embodiments for a lubrication system for an internal combustion engine are provided. In one example, a lubrication system for an internal combustion engine comprises a lubricant circuit, a radiator for cooling the lubricant, a heat accumulator arranged upstream of the engine for warming up the lubricant, the heat accumulator connected in parallel to the radiator, and a valve for switching over the lubricant circuit between the radiator and the heat accumulator. In this way, the oil may be rapidly heated during cold engine start conditions.

Abstract: A breather device for a combustion engine includes a breather chamber in which oil mist in the combustion engine is introduced, a breather passage that guides the oil mist to the breather chamber from a crank chamber, and a blowby gas passage that guides, to an air intake passage, blowby gas having been subjected to gas-liquid separation in the breather chamber. A separator is accommodated in a blowby drawing pipe forming the blowby gas passage. The oil mist is made into droplets by the separator so that the liquid component is collected in the breather chamber.

Abstract: A vehicle combustion noise-masking control method includes: receiving driving information of a vehicle; estimating a frequency of a combustion noise generated in the vehicle using the driving information; and outputting a masking sound when the frequency is equal to or larger than a predetermined frequency.

Abstract: A honeycomb filter includes a plurality of cells and porous cell walls. Exhaust gas is to flow through the plurality of cells. The plurality of cells include exhaust gas introduction cells and exhaust gas emission cells. The honeycomb filter has a round cross sectional shape. Each of the exhaust gas emission cells is adjacently surrounded fully by the exhaust gas introduction cells. In the cross section, the exhaust gas introduction cells and the exhaust gas emission cells each have a polygonal shape. In the cross section, a side forming a cross sectional shape of each of the first exhaust gas introduction cells faces one of the exhaust gas emission cells, a side forming a cross sectional shape of each of the second exhaust gas introduction cells faces one of the exhaust gas emission cells.

Abstract: An exhaust after-treatment system for treating an exhaust produced by an engine. The exhaust after-treatment system includes an exhaust passage, a catalytic exhaust after-treatment component in communication with the exhaust passage for treating the exhaust, and a metal hydride module in communication with the exhaust passage that receives a portion of the exhaust therein at a location positioned upstream from the catalytic exhaust after-treatment component. The portion of the exhaust that enters the metal hydride module reacts with a metal hydride contained in the metal hydride module to produce hydrogen gas that facilitates the treating of the exhaust by the catalytic exhaust after-treatment component.

Abstract: In a method for operating an SCR catalytic converter system of an internal combustion engine, the SCR catalytic converter system comprises at least one SCR catalytic converter (30) and at least one upstream SCR-coated particulate filter (20). In order to inject liquid reducing agent for the SCR catalytic converter (30) and/or for the SCR-coated particulate filter (20), a first injection position is provided upstream of the SCR-coated particulate filter (20) in the form of a first metering device (40) and a second injection position is provided upstream of the SCR catalytic converter (30) and downstream of the SCR-coated particulate filter (20) in the form of a second metering device (50). The injection positions for the injection of liquid reducing agent are selected in a manner which is dependent on the operating states of the SCR catalytic converter system.

Abstract: In the case of a method for checking the plausibility of a NOx sensor (62; 63) in an SCR catalytic converter system having at least one first SCR catalytic converter device (20) and having at least one second SCR catalytic converter device (30) and having in each case one dosing point (40, 50) for a reducing agent solution for the SCR catalytic converter devices (20, 30) upstream of the respective SCR catalytic converter device, the NOx sensor (62) to be checked for plausibility is situated either between the first SCR catalytic converter device (20) and the second SCR catalytic converter device (30), or the NOx sensor (63) to be checked for plausibility is situated downstream of the second SCR catalytic converter device (30).

Abstract: A variety of methods and arrangements for controlling the exhaust gas temperature of a lean burn, skip fire controlled internal combustion engine are described. In one aspect, an engine controller includes an aftertreatment system monitor and a firing timing determination unit. The aftertreatment monitor obtains data relating to a temperature of one or more aftertreatment elements, such as a catalytic converter. Based at least partly on this data, the firing timing determination unit generates a firing sequence for operating the engine in a skip fire manner such that the temperature of the aftertreatment element is controlled within its effective operating range.

Abstract: A vehicular exhaust device is disclosed. The vehicular exhaust device includes an exhaust pipe, which is connected at one end to an exhaust manifold of a cylinder and at the other end to a catalytic converter. In particular, an intermediate portion of the exhaust pipe is in contact with the side surface of the catalytic converter so as to heat the catalytic converter by heat of the exhaust pipe.

Abstract: An exhaust system includes: an exhaust pipe defining an exhaust path of exhaust gas to atmosphere; a recirculation pipe defining a recirculation path separating a part of exhaust gas passing through the exhaust pipe and allowing the part to flow back to a power unit; a purification unit purifying exhaust gas by catalyst; and a heating device heating exhaust gas before purification to activate the purification ability of the catalyst. The heating device includes: an acoustic-wave generator generating acoustic waves by absorbing heat from exhaust gas passing through the recirculation pipe and by giving the heat to working fluid to cause the working fluid to oscillate, and a heat transfer part transferring heat of exhaust gas in the exhaust pipe passing through a downstream position from the purification unit to exhaust gas in the exhaust pipe passing through an upstream position from the purification unit by using acoustic waves.

Abstract: An exhaust gas arrangement includes an exhaust gas system for conveying an exhaust gas stream. The exhaust gas system includes a turbine and an exhaust gas treatment system. The exhaust gas arrangement further includes a working fluid circulation circuit connected to the exhaust gas system for recovery of energy from the exhaust gas stream. The working fluid circulation circuit includes a first heat exchanger which is arranged at a waste heat source for heat exchange between the waste heat source and a working fluid in the working fluid circulation circuit, and a second heat exchanger positioned in the exhaust gas system for heat exchange between the exhaust gas and the working fluid. The second heat exchanger is positioned downstream of the turbine and upstream of a particle filter in the exhaust gas treatment system. An internal combustion engine system and a vehicle including such an exhaust gas arrangement are also disclosed.

Abstract: A heat recovery device comprises a coolant path segment and a thermal expansion bracket. The thermal expansion bracket has two end portions supported by the coolant path segment and a middle portion supported by an exhaust gas path segment that is spaced a distance away from the coolant path segment. The thermal expansion bracket is configured to deform in response to an increase in temperature to increase the distance and decrease heat transfer between the segments.

Abstract: Methods and systems are provided for controlling a vehicle engine to adjust exhaust warm-up strategy based on a vehicle network information. In one example, in response to an expected decrease in temperature of a catalyst of a vehicle below a threshold and an estimated duration thereof based on communications external from the vehicle, a method may include delaying catalyst heating actions, when the catalyst heating actions are determined to be unable to heat up the catalyst to threshold temperatures. However, the catalyst heating actions may be enabled when the catalyst heating actions are determined to be able to achieve the threshold temperature within the duration.

Abstract: Methods and systems are provided for sensing particulate matter by a particulate matter sensor positioned downstream of a diesel particulate filter in an exhaust system. In one example, a method may include accumulating incoming particulate matter by applying a higher bias to a first trap of the particulate matter sensor, and further charging the particulate matter and forming highly charged dendrites. The method further includes capturing the dendrites exiting the first trap by applying a lower bias to a second trap also housed within the same particulate matter sensor, thereby reducing the effects of exhaust flow rate on the particulate matter sensor and further increasing the sensitivity of the particulate matter sensor.

Abstract: In a method for diagnosing an SCR catalyst system of an internal combustion engine, the SCR catalyst system comprises at least one first SCR catalyst device (20) and at least one second SCR catalyst device (30). A first injection position upstream of the first SCR catalyst device (20) in the form of a first metering device (40) is provided for injecting liquid reducing agent for the SCR catalyst devices (20, 30). A second injection position between the two SCR catalyst devices (20, 30) in the form of a second metering device (50) is furthermore provided. Both SCR catalyst devices (20, 30) are monitored in a differentiated way by means of active and passive diagnostic methods.

Abstract: A sensor apparatus for detecting at least one property of a fluid medium, in particular of an exhaust gas of an internal combustion engine, and to a method for furnishing a sensor apparatus of that kind. The sensor apparatus encompasses at least one protective housing for reception of at least one sensor element in an inner housing, the inner housing being surrounded at least partly by an outer housing. The outer housing is secured with reference to the inner housing by way of a press fit, in particular over a portion. The sensor apparatus according to the present invention exhibits good resistance to thermal shock simultaneously with good sensor element dynamics, and allows an oriented design of the protective housing to be furnished.

Abstract: A piston cooling jet for an internal combustion engine includes a body having a coolant duct extending between a coolant duct inlet and a coolant duct outlet fluidly connected to a coolant nozzle. The piston cooling jet includes a plunger having a plunger stem and a plunger head. The plunger is movable within the coolant duct of the body between a closing position that closes the coolant duct inlet and an opening position that opens the coolant duct inlet. The piston cooling jet further includes a biasing spring coupled to the plunger to bias it towards the closing position. A plunger coolant channel has an inlet at the plunger head and an outlet at the plunger stem, channeling coolant downstream of the plunger head when the plunger is in the opening position.

Abstract: A fluid control apparatus configured to be able to reduce electric power consumption required for opening/closing operations of a fluid control valve includes a valve body and a valve seat one of which is formed of a magnetic material and the other of which includes a magnet, the valve body and the valve seat being incorporated in a fluid flow passage and movable to come into contact with or away from each other to control communication of fluid, an urging member configured to urge the valve body toward the valve seat, an electric pump for flowing the fluid in the flow passage, and a control section for effecting control to increase an output of the electric pump to a preset state when the valve body under a closed state as being in contact with the valve seat is to be opened.

Abstract: A shunt tank assembly for a cooling system is provided. The shunt tank assembly includes a vent tube, a shunt tank, and an inlet port provided on the shunt tank. The inlet port is in fluid communication with the vent tube. The shunt tank assembly also includes an insert disposed in the inlet port. The shunt tank assembly further includes a drop tube. The drop tube includes a plug portion having a first length and received within the insert. The drop tube includes a transition portion tapered with respect to the plug portion. The drop tube includes a tube portion extending from the transition portion and terminating with a chamfered end. The tube portion has a second length greater than the first length of the plug portion. The tube portion is bent such that the chamfered end is disposed below an average coolant level of the shunt tank.

Abstract: To allow an intake negative pressure to directly act on a fuel outlet formed on a nozzle tube, and to guide a fuel discharged from the fuel outlet in the nozzle tube to the fuel-air mixture passage. A rotary carburetor (200) has a guide plate member (42) downstream of a fuel outlet (30) located in a through-hole (14). The guide plate member (42) has both side edges (42b) away from an inner wall surface (14a) of the through-hole (14). The through-hole (14) is divided by the guide plate member (42) into a first passage portion (44) and a second passage portion (46). The first passage portion (44) communicates through a piston groove with a scavenging passage of a cylinder. The fuel discharged from the fuel outlet (30) is guided by the guide plate member (42) to the second passage portion (46) and is supplied through the second passage portion (46) to a fuel-air mixture passage (24) of an engine intake system.

Abstract: The present teachings generally include a rotor assembly having a plurality of rotor sheets or layers mounted to a shaft, and methods of construction for a rotor assembly. Each rotor sheet or layer in the assembly may be provided with a central opening extending between the first and second sides through which the shaft extends. In one aspect, the rotor sheets or layers can be provided with a plurality of lobes extending away from the central opening, wherein each of the lobes can have a lobe opening extending through the thickness of the sheets or layers. In one example, the rotor sheets or layers can be rotationally stacked to form a helical rotor. In one example, the rotor sheets are formed from a pre-cured composite material and are bonded together with an adhesive.

Abstract: An engine system and method utilizing a compressor map to control compressor speed of a driven turbocharger in the engine system is provided. A desired compressor speed is determined that corresponds to a boost pressure and to a mass flow rate of intake from the compressor map. The transmission of the driven turbocharger is shifted to a ratio that drives the compressor to a desired speed to provide the desired boost pressure and air flow to the engine system.

Abstract: A method for operating an engine system is provided. The method includes during a first condition, flowing exhaust gas from a first exhaust gas conduit to a first turbine inlet of a turbine and flowing exhaust gas from a second exhaust gas conduit to a turbine bypass conduit and during a second condition, flowing exhaust gas from the first exhaust gas conduit to the first turbine inlet and exhaust gas from the second exhaust gas conduit to a second turbine inlet.

Abstract: A plurality of variable nozzles is provided at equal intervals in a circumferential direction so as to surround a turbine wheel between a facing surface of a first nozzle ring and a facing surface of a second nozzle ring. The first nozzle ring is constituted by three nozzle ring segments laminated along the axial direction. In the three nozzle ring segments, a thickness of the nozzle ring segment on a side far from the bearing housing is smaller than a thickness of the nozzle ring segment on a side close to the bearing housing.

Abstract: A device for internal cooling and pressurization of rotary engine, comprising: a mechanical charger, a charger outlet tube, a core cooling intake tube, an engine air intake tube, a first valve, a second valve, and a third valve. The mechanical charger is mounted in a ventilated place. The charger outlet tube is used to dispense air, and the charger outlet tube has two sides, with one side coupled to the mechanical charger. The core cooling intake tube is connected to another side of the charger outlet tube, and is used to dispense air. The engine air intake tube is connected to another side of the charger outlet tube. The device for cooling and pressurization of rotary engine is capable of achieving improved cooling and performance of rotary engine, through switching a plurality of valves, in automatic control manner and/or in remote control manner.

Abstract: A portable engine-driven system comprising an engine, wherein the engine is configured to drive a generator, a fuel tank, and a high pressure fuel pump operatively coupled to the engine and the fuel tank. The high pressure fuel pump may be positioned within the fuel tank and configured to pump fuel from the fuel tank to the engine. A check valve and a fuel pressure regulator may be positioned in line between the high pressure fuel pump and the engine, wherein the pressure regulator is configured to regulate a pressure of the fuel between the high pressure fuel pump and the engine. The pressure regulator may be positioned within the fuel tank.

Abstract: A cleaning system and method use an ultrasound probe, a coupling mechanism, and a controller to clean equipment of a vehicle system. The ultrasound probe enters into an engine. The ultrasound probe emits ultrasound pulses and the coupling mechanism provides an ultrasound coupling medium between the ultrasound probe and one or more components of the engine. The controller drives the ultrasound probe to deliver the ultrasound pulse through the coupling medium to a surface of the one or more components of the engine. The ultrasound probe delivers the ultrasound pulse to remove deposits from the one or more components of the engine.

Abstract: When a combustion pressure sensor is formed that includes at least: a case member which has a joint surface on the side of a tip end and in which an opening portion is provided; a joint surface which is brought into planar contact with the joint surface of the case member so as to block the opening portion; a pressure reception member on which a combustion pressure acts; a welding portion in which the joint surfaces are joined to each other; and a piezoelectric element which is stored in the case member and converts a pressing force based on the combustion pressure transmitted from the pressure reception member into a signal, on the side of one edge side in at least the one joint surface, the one joint surface is limited to a given depth of welding from the other edge side, a predetermined clearance portion is provided so as to form a predetermined gap with the opposite other joint surface and a welding portion is provided which includes at least all the limited joint surface from the other edge side in the o

Abstract: A combustor for a gas turbine engine comprises a combustion liner to define a combustion chamber for burning fuel to drive to turbine. The combustion liner comprises a plurality of nugget holes for providing cooling fluid to create a cooling film over the surface of the combustion liner adjacent the combustion chamber. The nugget holes can be circumferentially angled relative to the engine centerline to provide the flow of cooling fluid in an angled manner to align with a local streamline for the flow of fluid from the combustor.