摘要:
A method of making a multilayer environmental barrier coating for a ceramic matrix composite is provided, comprising the steps of: plasma spray coating an oxide-based bond coat over top of the ceramic matrix composite and depositing a columnar top coat over the oxide-based bond coat.
摘要:
A cooling system for an aircraft includes a first cooling circuit having a first evaporator and a second evaporator, and a second cooling circuit having a third evaporator and a fourth evaporator. One of the first and second cooling circuits includes a first set of valves arranged to direct refrigerant through a first cooling sub-circuit, a second cooling sub-circuit, or both the first and second cooling sub-circuits based on ambient conditions. Two of the evaporators are installed on a first side of the aircraft, and the other two of the four evaporators are installed on a second side of the aircraft opposite the first side, and the first and second cooling circuits reject heat, via a heat exchanger, from their respective cooling circuit to air passing into an engine of the aircraft.
摘要:
A structure providing compliance and sealing between ceramic or ceramic composite (CMC) part and a metallic part has an interface component for centering the CMC part in the metallic part, thus reducing thermal stress motion of the CMC component. In gas turbine engine applications, the structure comprises a CMC blade track inserted in a clip placed within a metallic hanger. The clip provides for radial compliance and secures controlled leakage of cooling air required to ensure that acceptable temperatures are maintained for the metallic structures. A washer is positioned adjacent to the clip provide for axial orientation of the blade track.
摘要:
Embodiments are disclosed of a turbomachinery component having an outer part that is captured between a cap and a base of the component. In one form, the outer part is placed in compression between the cap and the base. The outer part can be formed prior to being placed between the cap and the base. In some forms, the outer part can be formed partially or completely while engaged with the component. A fugitive spacer can be placed between the outer part and an extension of the component. In various embodiments, the extension can reach into an opening of the outer part and the cap can be coupled with the extension.
摘要:
An improved combustor for a gas turbine is operable to provide high combustion efficiency in a compact combustion chamber. The combustor includes a counter swirl doublet for improved fuel/air mixing. The enhanced combustor assembly and method of operation improves operation of the turbine.
摘要:
In some examples, an alloy may include less than 55 atomic percent aluminum; between about 10 and about 25 atomic percent of a platinum group metal; and a balance of nickel; at least one of chromium, silicon, tantalum, or cobalt; a reactive element; and diffusion impurities; where the alloy has a discrete gamma-prime Ni 3 A1 region and a discrete beta NiA1 region. In some examples, a coating system may include a substrate; a first layer including gamma-prime Ni 3 A1; and a second layer including beta NiA1, where the first region and the second region are discrete dual region.
摘要:
An aerodynamic fan nosecone for a gas turbine engine is provided and includes a fan nosecone 0 that may be made of composite material. To improve airflow transition to the blade members, aerodynamic fairings 40 are provided and are secured to an exterior surface of the nosecone which enhances fuel economy. The fairings may be secured to the nosecone by various methods, including providing for the fairings to be changed out and replaced with other fairings on the same nosecone assembly 20.
摘要:
A metal additive method includes directing sonic and/or ultrasonic energy from a probe (106) that is directed toward a melt pool (108) during solidification of the melt pool (108) and formation of a layer(102), wherein a solid portion of an object on which the pool is positioned at least partially surrounds the melt pool.
摘要:
A method for repairing a component may include machining a depression into the component. A size and a shape of the depression may be configured to remove a damaged portion of the component; and wherein the depression forms a repair volume. The method also may include depositing a plurality of continuous additive weld layers, each continuous additive weld layer of the plurality of continuous additive weld layers having a beginning point and an ending point. The beginning point and the ending point of a first continuous additive weld layer of the plurality of additive weld layers may be formed at or beyond an outer boundary of the repair volume. The beginning points and the ending points of the remainder of the plurality of continuous additive weld layers may be formed at or beyond the outer boundary of the repair volume.
摘要:
A combustor is provided in which a fuel and working fluid can be injected in an annulus. In one form the fuel and working fluid is circumferentially flowed within the annulus and traverses the annulus in an axial direction from one side to another side where the flow exits. The working fluid and air can be co-axially admitted to the combustor and in one form the working fluid can be swirled about the fuel dispensed from a fuel injector. The combustor can provide for a rich burning zone. In one embodiment the combustor is configured as an inter- turbine combustor having an outlet at one axial side of the combustor. A lean burn region can be created within a flow path of the turbine.