THE PERFORMANCE OF AN AIR-AIR EJECTOR ACCORDING TO A QUASI-ONE-DIMENSIONAL THEORY
AERONAUTICAL RESEARCH COUNCIL LONDON (UNITED KINGDOM)
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A quasi-one-dimensional theory is developed for the flow in an air-air ejector with sonic injection. It is based on the concept of general or two stream choking and deals with the constant area compressible mixing of two streams of the same gas with constant specific heats. Some numerical solutions are presented for the case of an air-air ejector. The effects of the total pressure ratio and total enthalpy ratio between the injected streams are determined for various geometries. The maximum flow or choked solutions are also investigated. The theory is extended to cover the cases of supersonic injection and the mixing of two different gases. A few numerical results for supersonic injection are presented.
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