Patent ID: 9677501
Date: 2017-06-13
CPC Classifications: F02K,F05D,Y02T

Claim:
1. A variable internal exhaust area nozzle for a gas turbine engine, comprising: a plurality of flap trains extending around a periphery of the gas turbine engine, with each flap train including a convergent flap pivotally attached to an engine body and a divergent flap pivotally attached to the engine body downstream of the convergent flap; and a fluid circuit in communication with the convergent and divergent flaps and configured to pivot the convergent and divergent flaps between a radially inward position and a radially outward position; wherein the convergent flap has a closing pressure chamber selectively communicating with a closing portion of the fluid circuit, and the convergent flap is configured to move radially outward in response to the closing pressure chamber receiving a working fluid from the closing portion of the fluid circuit; wherein the divergent flap has a closing pressure chamber selectively communicating with a closing portion of the fluid circuit, and the divergent flap is configured to move radially outward in response to the closing pressure chamber receiving a working fluid from the closing portion of the fluid circuit.