Patent ID: 6112512
Filing Date: 2000-09-05
Classification: F02K

Abstract:
A control system for vectoring a primary flow within a small area expansion ratio nozzle by varying an effective throat of the small area expansion ratio nozzle, comprising:an opening for accepting the primary flow;a smooth converging portion of the nozzle wherein the primary flow is at a subsonic velocity;a throat coupling said converging portion to a diverging portion of the nozzle downstream of said throat;at least one primary injector located proximate to the throat wherein said at least one injector is inclined to oppose the primary flow;at least one supplemental injector wherein the at least one supplemental injector is located in the nozzle downstream of the at least one primary injector, wherein said at least one supplemental injector is inclined to oppose the primary flow, and wherein the at least one primary and supplemental injectors provide a cross flow field opposed to a subsonic portion of the primary flow in order to vary an effective throat within the nozzle; andat least one controller operable to direct said at least one primary and supplemental injector to provide a pulsed cross flow operable to vary the effective throat within the nozzle.