Abstract: A method of inducing swirl in pressurized air flowing through an air passageway of a fuel nozzle of a gas turbine engine includes inducing swirl in the pressurized air at an exit of the air passageway, by directing the pressurised air through helicoidal grooves formed at a downstream end of the air passageway. The swirling pressurized air exiting the air passageway is then directed into a mixing zone at a downstream end of the fuel nozzle.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The fuel passageway has an outer wall including an exit lip at a downstream portion of the outer wall. The exit lip has a surface treatment including a swirl-inducing relief. A gas turbine engine and a method of inducing swirl in at least one of pressurised fuel and air exiting a fuel nozzle of a gas turbine engine are also presented.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The air passageway has a swirl-inducing relief defined at an exit lip of an outer wall of the air passageway. A gas turbine engine and a method of inducing swirl in an air passageway of a fuel nozzle of a gas turbine engine are also presented.

Abstract: A seal for sealing a combustor heat shield against an interior surface of a combustor shell, the seal comprising: a first sealing surface on the interior surface of the combustor shell; and a second sealing surface on a rail on an edge of a heat shield, wherein each of the first and second sealing surfaces include first and second projections defining a non-linear leakage path between the projections.

Abstract: A seal for sealing a combustor heat shield against an interior surface of a combustor shell, the seal comprising: a first sealing surface on the interior surface of the combustor shell; and a second sealing surface on a rail on an edge of a heat shield, wherein each of the first and second sealing surfaces include first and second projections defining a non-linear leakage path between the projections.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The fuel passageway has an outer wall including an exit lip at a downstream portion of the outer wall. The lip generally increases in diameter as it extends downstream.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The air passageway has a swirl-inducing relief defined at an exit lip of an outer wall of the air passageway. A gas turbine engine and a method of inducing swirl in an air passageway of a fuel nozzle of a gas turbine engine are also presented.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, an air passageway defined axially in the body, and a fuel passageway defined axially in the body radially outwardly from the air passageway. The fuel passageway has an outer wall including an exit lip at a downstream portion of the outer wall. The exit lip has a surface treatment including a swirl-inducing relief. A gas turbine engine and a method of inducing swirl in at least one of pressurised fuel and air exiting a fuel nozzle of a gas turbine engine are also presented.

Abstract: A fuel nozzle for a combustor of a gas turbine engine includes a body defining an axial direction and a radial direction, a primary air passageway centrally defined axially in the body, and a plurality of concentrically-arranged nozzle tip projections disposed at a downstream portion of the body. Each of the plurality of nozzle tip projections has a radially inwardly facing fuel filming surface communicating with respective fuel passages. The fuel filming surfaces are disposed radially outwardly of an outlet of the primary air passageway. A method for delivering fuel from a fuel nozzle of a combustor of a gas turbine engine is also presented.

Abstract: A seal for sealing a combustor heat shield against an interior surface of a combustor shell, the seal comprising: a first sealing surface on the interior surface of the combustor shell; and a second sealing surface on a rail on an edge of a heat shield, wherein each of the first and second sealing surfaces include first and second projections defining a non-linear leakage path between the projections.

Abstract: A method and an apparatus for reducing airflow leakage between a combustor liner and a rail of a heat shield mounted to an inner surface of the combustor liner. The method comprises locally deforming the combustor liner in sealing engagement with the rail by applying a pressure on the outer surface of the combustor liner over the rail of the heat shield. A tool, such as a sealing clip, may be mounted in pressing engagement with the outer surface of the combustor liner to apply forces locally on the liner over the rail of the heat shield.

Abstract: A molding assembly for forming a product having an embedded member, includes an injection mold for molding the embedded member as a part of the product, and a positioning mechanism for positioning the embedded member in the injection mold. The injection mold has at least one first positioning post. The positioning member and the embedded member are integrally formed, and the positioning member defines a first hole for receiving the first positioning post to prevent the embedded member from offsetting in a first direction during the mold process of the product.

Abstract: A locking structure includes a hook disposed on a first object and engagable with a locking member disposed on a second object. The locking member includes a main body rotatable about an axis thereof and a number of locking portions radially protruding from the main body. When the main body rotates about the axis, the locking portions rotate together with the main body to engage with and disengage from the hook to lock the first object to and unlock the first object from the second object.

Abstract: An electronic device includes a housing, a number of keys and a keypad fixed on an inner surface of the housing under the keys. The PCB includes a plurality of edges, a plurality of cutouts having one is defined in a first edge of the edges, and a plurality of bolt holes having one is arranged adjacent to a second edge of the edges. A bolt extends through the bolt hole and threaded engaged with the housing. The housing further includes a plurality of holders arranged on the inner surface of the housing, each holder includes a first retaining plate and a second retaining plate, the first retaining plate is accommodated in the corresponding cutout and the second retaining plate resists against the keypad to prevent the keypad from disengaging from the holder.

Abstract: A housing of an electronic device includes a first plate and a second plate detachably secured to the first plate. The first plate defines a latching hole and has an elastic cantilever defining a through hole. The second plate has a protrusion corresponding to the through hole and a latching member corresponding to the latching hole and capable of sliding along the latching hole between an unlatched position disengaging with the latching hole and a latched position engaging with the latching hole. When sliding to the latching position, the latching member engages with the latching hole to prevent the second plate from moving in a first direction, the elastic cantilever elastically deforms to allow the protrusion to be received and held in the through hole, the protrusion abuts the elastic cantilever to prevent the second plate from moving in a second direction reverse to the first direction.

Abstract: A locking structure includes a hook disposed on a first object and engagable with a locking member disposed on a second object. The locking member includes a main body rotatable about an axis thereof and a number of locking portions radially protruding from the main body. When the main body rotates about the axis, the locking portions rotate together with the main body to engage with and disengage from the hook to lock the first object to and unlock the first object from the second object.

Abstract: According to another aspect, an optical recording and/or reproducing apparatus includes a frame, a spindle motor, a pair of parallel guide rails, an optical pickup head, and a shield mounted on the guide rails. The shield extends a protection surface higher than a lens of the optical pickup head. The protection surface is in an optical disc region and lowers than the optical disc when the optical disc is supported on the spindle motor.

Abstract: A phase-change memory element and fabrication method thereof is provided. The phase-change memory element comprises an electrode. A first dielectric layer is formed on the substrate. An opening passes through the first dielectric layer exposing the electrode. A heater with an extended part is formed in the opening, wherein the extended part protrudes the opening. A second dielectric layer surrounds the extended part of the heater exposing the top surface of the extended part. A phase-changed material layer is formed on the second dielectric layer to directly contact the top of the extended part.

Abstract: A traverse module for a disc apparatus includes a chassis, a spindle motor for rotating a disc thereon, a gasket set positioned between the spindle motor and the chassis; and a screw set corresponding to the gasket set. The spindle motor is mounted on the chassis. The screw set adjustably secures the spindle motor and the chassis via the gasket set.