General Electric Company

Eric H Lewis

Donald Michael Corsmeier

Kenneth L Johnson

William L Weaver

An augmentor screech suppressor for a gas turbine engine includes a screech suppressor liner mounted on a screech housing and an actuator for translating the screech suppressor liner axially forward and aft, with the actuator located outside the outer duct of the engine. In a preferred embodiment in a variable cycle gas turbine engine, a variable area bypass injector (VABI) valve with a circumferentially conical surface slopes into the screech suppressor liner surface and inner and outer crank arms transfer linear motion from the actuator through the outer duct wall, cooperating with idler arms to translate the screech suppressor housing, and thus the VABI valve and screech suppressor linear, axially between open and closed valve position.

Axially translating screen suppressor for a gas turbine engine augmentor

A variable area bypass injector (VABI) for a variable cycle gas turbine engine includes a circumferentially continuous valve with a conical surface sloping into a screech suppressor surface, a circumferentially segmented seal attached to the diffuser, and a valve actuator located outside the outer duct of the engine. Each seal segment is spring loaded to allow for different axial movement between circumferentially adjacent segments, and has a seat portion complimentary to the valve conical surface for sealingly engaging the valve when in closed position. Additionally, the seal segments are shaped with a low aerodynamic profile and cooperate with the VABI conical surface, when the valve is in an open position, to provide an annular conic channel that keeps the bypass flow attached to the VABI valve and core flowpath walls as it is injected into the core gas stream. Inner and outer crank arms transfer linear motion from the actuator through the outer duct wall, cooperating with idler arms to translate the valve and screech suppressor axially between open and closed valve positions.

Variable area bypass injector

A variable area bypass injector (VABI) seal for a variable cycle gas turbine engine includes a circumferentially segmented seal attached to the diffuser. Each seal segment is spring loaded to allow for different axial movement between circumferentially adjacent segments, and has a seat portion complimentary to a VABI valve conical surface for sealingly engaging the VABI valve when the VABI valve is in closed position. Additionally, the seal segments are shaped with a low aerodynamic profile and cooperate with the VABI valve conical surface, when the valve is in an open position, to provide an annular conic channel that keeps the bypass flow attached to the VABI valve and core flowpath walls as it is injected into the core gas stream.

Growing community of inventors

Loveland, OH, United States of America

Eric H Lewis