JET ENGINE EXHAUST NOZZLE AND ASSOCIATED SYSTEM AND METHOD OF USE

摘要

A first trailing edge portion (26) of a scarfed jet engine exhaust nozzle (24) aft of a second trailing edge portion (30) relative to a central axis (16) of an associated exhaust duct (10, 10.1) causes an automatic nozzle-pressure-ratio responsive transverse deflection of the associated exhaust flow (46) away from the first trailing edge portion (26). When offset from both the center of gravity (CG) and the central longitudinal axis (76) of an aircraft (40), at a relatively low nozzle pressure ratio, e.g. during takeoff, the thrust vector (44) from the exhaust flow acts relatively close to the CG, whereas at a relatively high nozzle pressure ratio, e.g. during relatively high-speed cruise, the scarfed exhaust nozzle (24) deflects the exhaust flow (46) so that the resulting thrust vector (44') is relatively parallel to the path (60) of the aircraft (40). With the final portion (10.1) of the exhaust duct (10) skewed, the primary axis (20) of the jet engine (12) can be relatively parallel to the path (60) of the aircraft (40).