Abstract: An objective-driven system for blade tip clearance control may comprise a BOAS and a controller in operable communication with the BOAS. A tangible, non-transitory memory may be configured to communicate with the controller, the tangible, non-transitory memory may have instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving an operating objective definition, and modulating a location of the BOAS using an optimization loop comprising the operating objective definition, input vector variables, and output vector variables driven by the input vector variables.

Abstract: An objective-driven system for blade tip clearance control may comprise a BOAS and a controller in operable communication with the BOAS. A tangible, non-transitory memory may be configured to communicate with the controller, the tangible, non-transitory memory may have instructions stored thereon that, in response to execution by the controller, cause the controller to perform operations comprising receiving an operating objective definition, and modulating a location of the BOAS using an optimization loop comprising the operating objective definition, input vector variables, and output vector variables driven by the input vector variables.

Abstract: A strut assembly for a bearing compartment of a gas turbine engine includes an inner case, an outer case, and a first plurality of struts. The inner case is disposed within the bearing compartment and includes a first axis. The outer case defines an exterior of the bearing compartment and includes a second axis disposed co-axially with the first axis. The inner and outer cases define a flowpath between the inner and outer cases. Each strut of the first plurality of struts extends between and is connected to the inner and outer cases. The first plurality of struts is configured to maintain concentric positioning between the inner and outer cases and to allow relative changes in size between the inner and outer cases without deforming the inner case.

Abstract: A valve includes a housing with a mounting portion, a venting portion, and a cap portion. The valve also includes a piston in the housing with a shaft, a disc, and a flange, the piston being moveable between a closed position and an open position. The valve also includes a vessel that is in contact with the cap portion and the flange wherein fluid pressure contained in the vessel biases the piston into one of the opened position and the closed position.

Abstract: A strut assembly for a bearing compartment of a gas turbine engine includes an inner case, an outer case, and a first plurality of struts. The inner case is disposed within the bearing compartment and includes a first axis. The outer case defines an exterior of the bearing compartment and includes a second axis disposed co-axially with the first axis. The inner and outer cases define a flowpath between the inner and outer cases. Each strut of the first plurality of struts extends between and is connected to the inner and outer cases. The first plurality of struts is configured to maintain concentric positioning between the inner and outer cases and to allow relative changes in size between the inner and outer cases without deforming the inner case.

Abstract: A valve includes a housing with a mounting portion, a venting portion, and a cap portion. The valve also includes a piston in the housing with a shaft, a disc, and a flange, the piston being moveable between a closed position and an open position. The valve also includes a vessel that is in contact with the cap portion and the flange wherein fluid pressure contained in the vessel biases the piston into one of the opened position and the closed position.

Abstract: A system for reducing moisture in a burner pressure sensing line in a gas turbine engine. A water trap is mounted on the burner pressure sensing line with an inlet for receiving burner pressure air and an outlet for transferring burner pressure air to the sensor. A heat sink is positioned inside the water trap for condensing moisture contained in the burner pressure air. Finned tubes are used to passively control the temperature of the burner pressure line. A deadheaded chamber provides an alternative location for the moist air to condense when the gas is compressed at higher pressure.

Abstract: A system for reducing moisture in a burner pressure sensing line in a gas turbine engine. A water trap is mounted on the burner pressure sensing line with an inlet for receiving burner pressure air and an outlet for transferring burner pressure air to the sensor. A heat sink is positioned inside the water trap for condensing moisture contained in the burner pressure air. Finned tubes are used to passively control the temperature of the burner pressure line. A deadheaded chamber provides an alternative location for the moist air to condense when the gas is compressed at higher pressure.