Patent ID: 7497666
Filing Date: 2009-03-03
Classification: F04F

Abstract:
1. A pressure-exchange ejector ( 1 ) having a housing ( 11 ) with a primary fluid inlet conduit ( 2 ), a secondary fluid inlet conduit ( 3 ), and a mixed-fluid outlet conduit( 4 ); and, a nozzle ( 5 ) fixedly mounted within said housing ( 11 ), receiving fluid from said primary fluid inlet conduit ( 2 ), which accelerates said primary fluid to form a stream at the nozzle discharge; and, said secondary fluid inlet conduit ( 3 ) in communication with a plenum ( 24 ) which is internal to said housing ( 11 ) and surrounds the downstream end of said nozzle ( 5 ); and, an aerodynamic shroud ( 10 ) which receives said secondary fluid from said plenum ( 24 ) and directs said secondary fluid towards said primary fluid so as to affect pressure-exchange between said primary and secondary fluids; and, a spindle ( 14 ) rigidly mounted to said housing ( 11 ); and, a rotor ( 7 ) pivotally connected to said spindle ( 14 ), said rotor ( 7 ) having an axi-symmetric revolute body and including a plurality of vanes ( 18 ) fixed to said revolute body, and, an essentially conical forebody ( 6 ) placed directly upstream of said rotor ( 7 ); the improvement comprising: said rotor ( 7 ) having the form of a base ( 27 ) with the shape of the frustum of a cone whose included angle is approximately equal to that of said forebody ( 6 ) and having ramp shaped vanes( 18 ) fixedly integrated on said rotor base ( 27 ) axi-symmetrically about the central longitudinal axis of rotation, said ramp-shaped vanes bounded by an essentially conical outer surface of revolution whose included angle is greater than that of said forebody ( 6 ).