Patent ID: 6112513
Filing Date: 2000-09-05
Classification: F02K

Abstract:
A small area expansion nozzle comprising:an opening for accepting a primary flow through the nozzle;a smooth convergent portion of the nozzle wherein said primary flow is subsonic;a physical throat coupling said converging portion to a diverging portion of the nozzle downstream of said physical throat;at least one primary injector located proximate to said physical throat wherein said at least one primary injector is oriented to oppose said primary flow; andat least one supplemental injector, wherein said at least one supplemental injector is located in the nozzle downstream of said at least one primary injector, wherein said at least one supplemental injector is oriented at an angle to oppose said primary flow and wherein said at least one primary and supplemental injectors provide a cross flow field opposed to said subsonic primary flow in order to vary an effective throat within the nozzle.