Fan jet silencer with fluid mixture

Claim 1

In an aircraft having a turbofan engine, the combination comprising: a thrust nozzle through which exhaust gas of said engine is discharged, a plurality of apertures extending through the wall of said nozzle and spaced apart circumferentially thereof; a tubular housing disposed in spaced relation around said nozzle, the space between said nozzle and said housing being communicatively connected with the fan section of said engine so that fan air flows therethrough in a substantially annular stream; a plurality of tubes respectively fixedly attached to the wall of said nozzle in register with said apertures and extending inwardly therefrom into the interior of said nozzle; a hollow ring mounted on the inner ends of said tubes in coaxial relation with said nozzle, said tubes respectively registering with apertures which extend through the wall of said ring, a slot extending circumferentiaLly around the aft end of said ring, whereby a portion of said fan air enters said tubes and flows therethrough to said ring and thence flows through said slot into said exhaust gas flowing through said nozzle, the remainder of said fan air flowing around the stream discharged from said nozzle.