Fuel injection assemblies and combustors are provided. A fuel injection assembly includes a fuel injector having a first annular wall that about an axial centerline and extends from a primary inlet disposed at a first end to a primary outlet disposed at a second end. A second annular wall surrounds the first annular wall. A fuel plenum is defined between the first annular wall and the second annular wall. A fuel duct extends from a fuel outlet defined in the second annular wall to a fuel inlet. wherein the fuel duct is in fluid communication with the fuel plenum. The fuel duct includes a polygonal segment and a cylindrical inlet segment. The polygonal segment extends from the fuel outlet to the cylindrical inlet segment.

A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, and a ring material used for producing the ring molded article, are provided. The present invention relates to the method for manufacturing a ring molded article having two convex portions which respectively protrude on both sides of the ring molded article in a direction of a center axis thereof and extend in a direction of a circumference of the ring molded article. In the manufacturing method, the ring material is placed inside two molds on which concave portions respectively corresponding to the convex portions are formed, in a condition in which the ring material is supported by a region on an outer peripheral side from an outer peripheral side corner in the concave portion of one of the two molds and a region on an inner peripheral side from an inner peripheral side corner in the concave portion of another of the two molds, the ring material is then forged so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced. In addition, the present invention relates to the ring material used for producing the ring molded article.

A turbine engine incorporating a fine particle separation means includes a radial compressor that rotates about a longitudinal axis, a radially-oriented diffuser located downstream and radially outward, with respect to the longitudinal axis, from the radial compressor, and a flow path positioned downstream and radially outward, with respect to the longitudinal axis, from the diffuser, wherein the flow path comprises an outer annular wall and an inner annular wall between which the compressed air flows, and wherein the flow path comprises an arc the redirects the compressed air from flowing in a substantially radial flow direction to a substantially axial flow direction. The turbine engine further includes an extraction slot in the outer annular wall that fluidly connects with a scavenge plenum, the scavenge plenum being positioned adjacent to and radially outward from the outer annular wall at a position downstream axially along the flow path from the arc.

To prevent a height difference from being produced between a metal sheath and a paint layer formed on a vane surface of a vane body. A coating apparatus includes a jig adapted to support a guide vane equipped with a metal sheath for covering a leading edge portion; a nozzle adapted to spray paint onto a vane body; a robot adapted to move the nozzle; and a control unit adapted to control a spraying operation of the nozzle and robot. The jig includes a movable covering body adapted to separably cover the metal sheath and cover an exposed portion of adhesive between a lateral edge portion of the metal sheath and the vane surface of the vane body, and a covering body drive unit adapted to move the movable covering body between a state in which the movable covering body covers the metal sheath and a state in which the movable covering body is separated from the metal sheath while covering the metal sheath. The control unit performs control to make transition from a sheath cladding coating mode to a finish coating mode.

The present invention relates to a method for producing energy by recycling materials during a fuel combustion process, wherein the fuel combustion process comprises combusting fuel introduced into the fuel combustion process. Further, the invention relates to an apparatus for producing energy by recycling materials during a fuel combustion process.

An electrical discharge machining method includes selectively immersing only a portion of a workpiece in an electrical discharge machining liquid such that a machining object portion included in the portion of the workpiece is opposed to an electrode immersed in the electrical discharge machining liquid and applying an electrical discharge machining to the machining object portion by applying a voltage between the electrode and the workpiece in a state where the portion of the workpiece is selectively immersed in the electrical discharge machining liquid.

An electrical discharge machining method includes selectively immersing only a portion of a workpiece in an electrical discharge machining liquid such that a machining object portion included in the portion of the workpiece is opposed to an electrode immersed in the electrical discharge machining liquid and applying an electrical discharge machining to the machining object portion by applying a voltage between the electrode and the workpiece in a state where the portion of the workpiece is selectively immersed in the electrical discharge machining liquid.

A sleeve for a probe of an environment-sensing device is provided. The sleeve includes a first portion and a second portion. The first portion includes a first inner surface, a first outer surface, a first body extending between the first inner surface and the first outer surface, at least one first body channel, and a first-portion projection extending axially along the first portion. The second portion includes a second inner surface, a second outer surface, a second body extending between the second inner surface and the second outer surface, at least one second body channel, and a second-portion receiving channel extending axially along the second portion. The at least one first body channel and at least one second body channel include a filler material. The first portion and the second portion are configured to couple together by mating the first-portion projection with the second-portion receiving channel.

A sleeve for a probe of an environment-sensing device is provided. The sleeve includes a first portion and a second portion. The first portion includes a first inner surface, a first outer surface, a first body extending between the first inner surface and the first outer surface, at least one first body channel, and a first-portion projection extending axially along the first portion. The second portion includes a second inner surface, a second outer surface, a second body extending between the second inner surface and the second outer surface, at least one second body channel, and a second-portion receiving channel extending axially along the second portion. The at least one first body channel and at least one second body channel include a filler material. The first portion and the second portion are configured to couple together by mating the first-portion projection with the second-portion receiving channel.

In a method for predicting a turbine outlet temperature at a future use of a gas turbine based on a past use thereof, the turbine outlet temperature (objective variable) at the future use is predicted by a turbine outlet temperature model by using a parameter (explanatory variable) in environmental and operational conditions planned for the future use and a rotating speed of a fan (explanatory variable) planned for the future use, and coefficients with respect to the explanatory variables are identified through a learning. In the learning, the coefficients are identified based on a regression learning of the explanatory variables and the objective variable of the turbine outlet temperature model made by using the parameter, the rotating speed of the fan and the turbine outlet temperature at the past use of the gas turbine.