Patent ID: 6571549
Filing Date: 2003-06-03
Classification: B64D,B64F,F02K,F05D

Abstract:
An apparatus for suppressing jet noise from a gas turbine engine having an exhaust nozzle for directing a flow of exhaust gasses from the engine, comprising:a first pulse injection unit located exteriorly of said nozzle, said first pulse injection unit including a resonance tube in outlet fluid communication with an injector nozzle, said injector nozzle having an outlet directed into the flow of the exhaust gasses; a second pulse injection unit located exteriorly of said nozzle and located oppositely, diametrically across the exhaust nozzle from said first pulse injection unit, said second pulse injection unit including a resonance tube in outlet fluid communication with an injector nozzle, said injector nozzle having an outlet directed into the flow of the exhaust gasses; a first source of high pressure gas in fluid communication with each of said resonance tubes; and, a second source of high pressure gas in fluid communication with each of said injector nozzles, said second source of high pressure gas including a switch for alternating the inlet flow of said high pressure gas between said injector nozzles.