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

[+] Author and Article Information
K. E. Hickman

Dynatech R/D Co., Cambridge, Mass.; York Division, Borg-Warner Corporation, York, Pa.

P. G. Hill

Mechanical Engineering Department, Queen’s University, Kingston, Ontario, Canada; Dynatech R/D Co.

G. B. Gilbert

Dynatech R/D Co., Cambridge, Mass.

J. Basic Eng 94(2), 407-416 (Jun 01, 1972) (10 pages) doi:10.1115/1.3425436 History: Received December 07, 1971; Online October 27, 2010


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.

Copyright © 1972 by ASME
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