초록 ▼

A supersonic jet engine having a nozzle section into which ambient air can be selectively introduced for a noise suppressing mode of operation, with this ambient air being intermixed with engine exhaust flow, through passageway segments. Flow modulating plugs or vanes are positioned at the exhaust e

A supersonic jet engine having a nozzle section into which ambient air can be selectively introduced for a noise suppressing mode of operation, with this ambient air being intermixed with engine exhaust flow, through passageway segments. Flow modulating plugs or vanes are positioned at the exhaust end of engine exhaust outlet segments in a mixing section, and these are operated during noise suppression mode to match engine requirements. There is a final nozzle section which during the noise suppressing mode is opened to present a relatively large cross sectional flow area to accommodate the mixed flow. During the non-noise suppressing mode, the final nozzle has a convergent/divergent configuration to control flow, and the plug or vane flow modulating means are positioned to permit unrestricted flow from the engine exhaust outlet segments.

대표청구항 ▼

A method of operating a supersonic jet engine assembly in a mixed flow, noise suppressing mode where ambient air is mixed with engine exhaust for noise suppression, and also to operate the engine in a substantially non-mixed flow mode, said method comprising: a. operating said assembly to receive ai

A method of operating a supersonic jet engine assembly in a mixed flow, noise suppressing mode where ambient air is mixed with engine exhaust for noise suppression, and also to operate the engine in a substantially non-mixed flow mode, said method comprising: a. operating said assembly to receive air into an inlet end of an engine assembly nacelle, direct the air to a jet engine positioned in said nacelle, and discharge gaseous exhaust from an outlet end of said engine; b. directing said gaseous exhaust from the engine to a nozzle section positioned which receives the gaseous exhaust from the engine; c. to operate in a noise suppressing mode, moving ambient air door means to an open position to admit ambient air into a passageway mixing section of said nozzle section, having passageway defining wall means; d. directing the gaseous exhaust from the engine to said passageway mixing section of the nozzle section and through a plurality of engine exhaust outlet segments, and also directing the ambient air through a plurality of ambient air outlet segments, interspersed with the engine exhaust outlet segments; e. directing the engine exhaust and the ambient air flow from said outlet segments into a mixing chamber positioned downstream of said passageway mixing section, with mixing occurring in said mixing chamber for noise suppression; f. directing said mixed flow into a variable area final nozzle portion positioned to provide a greater nozzle area cross section to accommodate volume of the mixed flow; g. operating engine exhaust outlet segment modulating means in a first noise suppressing modulating mode where the modulating means is positioned to provide a convergent/divergent outlet area at the engine exhaust outlet segments, and to increase and decrease the outlet area to match engine requirements during the noise suppressing mode, where ambient air is directed into said mixing chamber; h. for the non-mixed flow mode, closing the ambient air door means to a closed position to block flow of ambient air into the nozzle section; i. positioning said engine exhaust outlet segment modulating means in a second open operating mode where the engine exhaust modulating means is positioned to permit substantially unrestricted flow from said engine exhaust outlet segments; j. moving the variable area final nozzle portion to a convergent/divergent configuration to receive gaseous flow from said mixing chamber at subsonic velocity and discharge said gaseous flow at supersonic velocity.