Abstract:
A two-way flow control device including: a housing defining a first opening interface and a second opening interface, a rotor having a plurality of blades, each blade controllable to be angled in a range of positive and negative blade angles to generate respective positive and negative flows between the first opening interface and the second opening interface, first stator vanes mounted to the housing between the blades and the first opening interface, each including a respective stator vane slope having a stator vane angle which are collectively positive or negative angled; second stator vanes mounted to the housing between the blades and the second opening interface, each including a respective stator vane slope having a stator vane angle which are collectively opposite angled to the stator vane angles of the first stator vanes, the second stator vanes mounted to be circumferentially offset with respect to the first stator vanes.
Abstract:
A system for infrasonic pressure fluctuation (infrasound) control of a structure defining an interior. The system includes a reversible compressor including a housing defining an interior opening interface open to the interior of the structure and an exterior opening interface open to an exterior of the structure, and including at least one controllable element to generate positive pressure flows and negative pressure flows between the interior opening interface and the exterior opening interface. The system includes a first pressure sensor located to sense pressure indicative of the interior of the structure, a second pressure sensor located to sense pressure indicative of the exterior of the structure, and at least one controller configured to control the at least one controllable element of the compressor to cancel pressure oscillations within the interior of the structure based on the pressures detected by the first pressure sensor and the second pressure sensor.
Abstract:
A system for infrasonic pressure fluctuation (infrasound) control of a structure defining an interior. The system includes a reversible compressor including a housing defining an interior opening interface open to the interior of the structure and an exterior opening interface open to an exterior of the structure, and including at least one controllable element to generate positive pressure flows and negative pressure flows between the interior opening interface and the exterior opening interface. The system includes a first pressure sensor located to sense pressure indicative of the interior of the structure, a second pressure sensor located to sense pressure indicative of the exterior of the structure, and at least one controller configured to control the at least one controllable element of the compressor to cancel pressure oscillations within the interior of the structure based on the pressures detected by the first pressure sensor and the second pressure sensor.
Abstract:
An aircraft air system includes a gas turbine engine, a bleed air duct directing compressed air bled from a compressor to an inner compartment within the aircraft, and an air contamination detector located downstream of the gas turbine engine compressor. The air contamination detector includes a visual indicator which detects the presence of a fluid contaminant within the bleed air.
Abstract:
A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source.
Abstract:
The gas turbine engine comprises at least one electrical generator and an electrical heater associated with a gas path of the engine. The heater is powered by the generator to selectively add heat to the gas turbine cycle.
Abstract:
A power generating apparatus for use with an aircraft gas turbine engine has a low pressure spool assembly which includes an electrical generator. The electrical generator includes a generator stator supported on a stationary structure of the engine and a generator rotor rotatable around the generator stator and mounted to the low pressure spool assembly.
Abstract:
A power generating apparatus for use with an aircraft gas turbine engine has a low pressure spool assembly which includes an electrical generator. The electrical generator includes a generator stator supported on a stationary structure of the engine and a generator rotor rotatable around the generator stator and mounted to the low pressure spool assembly.
Abstract:
The torque transmission system for an aircraft engine permits a starter-generator to drive the engine on starting at a speed reducing ratio. Once the engine is running, the engine then drives the starter-generator also at a speed reducing ratio.
Abstract:
A housing assembly for an electrical device for use on an aircraft is provided. The assembly comprises a housing configured for containing at least one electrical component in a portion of the aircraft vented to atmosphere; and a pressure communication line for communicating between an interior of the housing and a source of pressurized gas available on the aircraft for other primary purpose.