Abstract: Fuel injectors, combustors, and methods of fabricating a fuel injector are provided. A fuel injector includes a forward end wall and an aft end wall disposed oppositely from one another. The fuel injector also includes side walls that extend between the forward end wall and the aft end wall. The forward end wall and the aft end wall are arcuate. The forward end wall, the aft end wall, and the side walls collectively define an opening for passage of air. The fuel injector further includes at least one fuel injection member disposed within the opening and extending between the forward end wall and the aft end wall.

Abstract: Fuel injectors, combustors, and methods of fabricating a fuel injector are provided. A fuel injector includes a forward end wall and an aft end wall disposed oppositely from one another. The fuel injector also includes side walls that extend between the forward end wall and the aft end wall. The forward end wall and the aft end wall are arcuate. The forward end wall, the aft end wall, and the side walls collectively define an opening for passage of air. The fuel injector further includes at least one fuel injection member disposed within the opening and extending between the forward end wall and the aft end wall.

Abstract: A containment arrangement for a gas turbine engine comprises: a radially outer annular casing 12; a fan track liner 28 radially within the casing comprising: an impact region 30 comprising a cellular material having a first compressive strength; at least one elongate ridge portion 26 extending through the impact region in a direction having an axial component, the ridge portion having a second compressive strength higher than the first compressive strength; and a gas-washed layer 38 radially within the fan track liner.

Abstract: A containment arrangement for a gas turbine engine comprises: a radially outer annular casing 12; a fan track liner 28 radially within the casing comprising: an impact region 30 comprising a cellular material having a first compressive strength; at least one elongate ridge portion 26 extending through the impact region in a direction having an axial component, the ridge portion having a second compressive strength higher than the first compressive strength; and a gas-washed layer 38 radially within the fan track liner.

Abstract: A containment arrangement for a gas turbine engine comprises: a radially outer annular casing (12); a fan track liner (28) radially within the casing comprising: an impact region (30) comprising a cellular material having a first compressive strength; at least one elongate ridge portion (26) extending through the impact region in a direction having an axial component, the ridge portion having a second compressive strength higher than the first compressive strength; and a gas-washed layer (38) radially within the fan track liner.

Abstract: A tangible, non-transitory, computer-readable medium, including computer-readable instructions that, when executed by one or more processors of a computer, cause the one or more processors to generate a first digital product definition associated with a computer-aided design (CAD) model.

Abstract: A containment arrangement for a gas turbine engine comprises: a radially outer annular casing (12); a fan track liner (28) radially within the casing comprising: an impact region (30) comprising a cellular material having a first compressive strength; at least one elongate ridge portion (26) extending through the impact region in a direction having an axial component, the ridge portion having a second compressive strength higher than the first compressive strength; and a gas-washed layer (38) radially within the fan track liner.

Abstract: A method of operating a computer system to convert non-interactive digital documents, such as electronic text and image files into interactive digital worksheets is provided. The method includes operating the computer system to prompt a user, such as a teacher for example, to identify a Base Document file accessible to the computer system. The computer system processes the Base Document to produce a corresponding dynamic document which allows the user to overlay data input fields overlaid. The user's overlays are recorded in a database along with meta-data that has been input by the user and which is associated with the overlaid data input fields. The meta-data that is recorded includes instructions determining the manner in which a further computational device, for example a student's PC, smartphone or tablet, interactively presents information of the base document to an end user, such as a student.

Abstract: The present invention relates to a manufacturing tool (13, 14) and method for use in forming polymer matrix composite products such as carbon fiber composite products. The tool comprising a first and a second portion defining a cavity (15) therebetween in which the product is built before curing. The rigidity of the second portion (13) of the tool is selected based on the required deflection of the second portion of the tool under the curing conditions, in order to maintain pressure on the laminate during the entire cure. The second upper portion (13) is shown haring varying thicknesses (16A, 16B and 16C) which results in different rigidity of these regions.

Abstract: The present invention relates to a manufacturing tool (13, 14) and method for use in forming polymer matrix composite products such as carbon fibre composite products. The tool comprising a first and a second portion defining a cavity (15) therebetween in which the product is built before curing. The rigidity of the second portion (13) of the tool is selected based on the required deflection of the second portion of the tool under the curing conditions, in order to maintain pressure on the laminate during the entire cure. The second upper portion (13) is shown haring varying thicknesses (16A, 16B and 16C) which results in different rigidity of these regions.

Abstract: A bore seal for connecting and sealing oil and gas tubular members is disclosed which has a metal core manufactured from a high yield strength ferrous material and a protective overlay of corrosion and abrasion resistant stainless steel and/or nickel based alloy. The protective overlay is applied to the entire outer surface of the bore seal by a metal thermal spray process, such as plasma thermal spraying. In a preferred embodiment of the invention, the bore seal has a fishtail profile which facilitates the use of resilient seals to provide resistance to external pressures in addition to the traditional metal-to-metal seal between the bore seal and the tubular members. In an alternative embodiment, a pressure relief valve is disposed within the bore seal to verify the integrity of the metal-to-metal seal with respect to internal bore pressure.

Abstract: A bore seal for connecting and sealing oil and gas tubular members is disclosed which has a metal core manufactured from a high yield strength ferrous material and a protective overlay of corrosion and abrasion resistant stainless steel and/or nickel based alloy. The protective overlay is applied to the entire outer surface of the bore seal by a metal thermal spray process, such as plasma thermal spraying. In a preferred embodiment of the invention, the bore seal has a fishtail profile which facilitates the use of resilient seals to provide resistance to external pressures in addition to the traditional metal-to-metal seal between the bore seal and the tubular members. In an alternative embodiment, a pressure relief valve is disposed within the bore seal to verify the integrity of the metal-to-metal seal with respect to internal bore pressure.

Abstract: A pair of form keys and a method for forming reverse drafts in foam parts are disclosed. A male form key is reciprocally mounted in a first mold half in a retracted position. A female form key is rotatably mounted in a second mold half in a neutral position. The first mold half includes a first drive pin that when engaged, moves the male form key into engagement with a foam sheet to form an undercut as the first and second mold halves are closed. The first mold half also includes a second drive pin that engages the female form key as the first and second mold halves close rotating the female form key into engagement with the foam sheet and the male form key. After closure of the mold and the product is formed, the mold is opened. As this occurs, the drive pins are disengaged and the male form key retracts and the female form key rotates to their neutral positions. The formed product may then be stripped from the mold while maintaining the reverse draft or undercut.

Abstract: A container 10 for rearing aquatic animals includes a floor portion 12 which defines a plurality of openings. A wall portion 100 bounds the floor portion 12 to form, together with the floor portion 12, a chamber for receiving the aquatic animals to be reared. A filter 105 is arranged in the openings of the floor portion 12. A closure plate 103 openably closes the openings in the floor portion 12. The invention extends also to a system which includes a plurality of the containers 10. The containers 10 are supported, in a partially immersed state in a vessel of the system. A circulating arrangement of the system circulates water through the containers 10.

Abstract: A container 10 for rearing aquatic animals includes a floor portion 12 which defines a plurality of openings. A wall portion 100 bounds the floor portion 12 to form, together with the floor portion 12, a chamber for receiving the aquatic animals to be reared. A filter 105 is arranged in the openings of the floor portion 12. A closure plate 103 openably closes the openings in the floor portion 12. The invention extends also to a system which includes a plurality of the containers 10. The containers 10 are supported, in a partially immersed state in a vessel of the system. A circulating arrangement of the system circulates water through the containers 10.

Abstract: A pair of form keys and a method for forming reverse drafts in foam parts are disclosed. A male form key is reciprocally mounted in a first mold half in a retracted position. A female form key is rotatably mounted in a second mold half in a neutral position. The first mold half includes a first drive pin that when engaged, moves the male form key into engagement with a foam sheet to form an undercut as the first and second mold halves are closed. The first mold half also includes a second drive pin that engages the female form key as the first and second mold halves close rotating the female form key into engagement with the foam sheet and the male form key. After closure of the mold and the product is formed, the mold is opened. As this occurs, the drive pins are disengaged and the male form key retracts and the female form key rotates to their neutral positions. The formed product may then be stripped from the mold while maintaining the reverse draft or undercut.

Abstract: A gage assembly for measuring a distance d from an end edge of a blade segment to a center location of a groove formed in the segment comprising a gage body having at least two reference surfaces adapted to engage edges of the segment; a dial indicator gage having a dial and a stem, the stem passing through a portion of the gage body; and a slide gage adapted for insertion into the groove, the slide gage fitted with an element that, in use, aligns with the stem of the dial indicator gage.

Abstract: A gage assembly for measuring a distance d from an end edge of a blade segment to a center location of a groove formed in the segment comprising a gage body having at least two reference surfaces adapted to engage edges of the segment; a dial indicator gage having a dial and a stem, the stem passing through a portion of the gage body; and a slide gage adapted for insertion into the groove, the slide gage fitted with an element that, in use, aligns with the stem of the dial indicator gage.

Abstract: A method of reconditioning a battery having a plurality of cells in a plurality of packs comprises electrically connecting the plurality of packs in series. A selected pack for reconditioning is electrically isolated from the remaining packs. A current produced by the battery is bypassed around the pack to be reconditioned by a bypass circuit. The selected pack is discharged. While being discharged, the current produced by the remaining battery is passed to an electrical load. Upon discharging, the selected pack is recharged.

Abstract: A method of reconditioning a battery having a plurality of cells in a plurality of packs comprises electrically connecting the plurality of packs in series. A selected pack for reconditioning is electrically isolated from the remaining packs. A current produced by the battery is bypassed around the pack to be reconditioned by a bypass circuit. The selected pack is discharged. While being discharged, the current produced by the remaining battery is passed to an electrical load. Upon discharging, the selected pack is recharged.