Pumping Ejector

Abstract

The present invention provides a fluid pumping ejector. The ejector includes a reservoir containing a primary fluid and a mixing duct. An ejector nozzle ejects the primary fluid from said reservoir into the mixing duct to entrain a secondary fluid and create a mixed flow with sufficient momentum and internal energy to achieve characteristic speed. A subsonic converging nozzle is coupled to the mixing duct downstream of the ejector nozzle and provides a characteristic cross section necessary for the mixed flow to achieve characteristic speed as it moves through said converging nozzle, thereby producing a standing shock wave at the point of maximum convergence of the nozzle. The ejector nozzle is fully-expanded, wherein exit speed of the primary fluid is supersonic and exit static pressure of the primary fluid is equal to secondary fluid pressure.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of and priority to U.S. Provisional Patent Application 61 / 016,289 filed Dec. 21, 2007, the technical disclosures of which are hereby incorporated herein by reference.[0002]This application is also related to co-pending application Ser. No. 12 / 024,573 entitled “Statically-Operating Ejector Ramjet,” Ser. No. ______ entitled “Hypermixing Fluid Ejector,” and Ser. No. ______ entitled “Ramjet Superheater,” concurrently filed herewith.TECHNICAL FIELD[0003]The present invention relates generally to fluid ejectors and more specifically to a pumping ejector that is capable of producing a mixed flow that achieves sonic speed.BACKGROUND OF THE INVENTION[0004]A ramjet is a type of air breathing propulsive engine that uses fixed components to compress and accelerate intake air by ram effect. It is also affectionately known as the flying stovepipe.[0005]FIG. 1 shows the basic elements of a ramjet power cycle and flowp...

AI Technical Summary

Problems solved by technology

However, the Fono ramjet has no direct means for completing the Brayton cycle and creating sonic inlet conditions.

The Fono ramjet conundrum prevents this propulsion concept from operating statically (unmoving) which is an obviously severe limitation for reducing to practice.

However, such designs employed mixing ejectors that were specifically designed to maximize fuel / air mixing over a shorter distance, rather than to create sonic conditions at the ramjet inlet.

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