Analysis and Testing of Compressible Flow Ejectors With Variable Area Mixing Tubes

Abstract

An analytical model has been developed to predict the flow behavior within axisymmetric single-nozzle ejectors employing variable-area mixing tubes. The primary flow may be supersonic or subsonic and may have a different stagnation temperature than the subsonic secondary flow. Tests were performed on an ejector with an 800 deg F supersonic (M = 2.72) primary jet to evaluate the analytical model. Measured velocity profiles, temperature profiles, and wall static pressure distributions are presented and compared to the analytical predictions. Agreement is generally good.