Patent ID: 6877960
Filing Date: 2005-04-12
Classification: F04F

Abstract:
1. An ejector system comprising: a. a convergent/divergent nozzle adapted in size and shape to supersonically accelerate a primary flow passing through the nozzle, and b. an ejector shroud generally coaxial with the nozzle, said nozzle and ejector shroud having a space there between for admitting a secondary flow; c. wherein the convergent/divergent nozzle includes a plurality of lobes for mixing the primary flow with the secondary flow, said lobes having a lobe wall contouring in the divergent area region of the nozzle for enhancing both the nozzle flow expansion and the mixing of the primary flow with the secondary flow, and d. wherein the ejector shroud is adapted in size and shape to decelerate and increase the flow pressure of the mixed primary and secondary flows passing through the ejector shroud, said shroud having a length to entrance diameter ratio from about 1 to about 3.5.