An Investigation of High Performance, Short Thrust Augmenting Ejectors

[+] Author and Article Information
Tah-teh Yang, Francois Ntone, Tong Jiang

Department of Mechanical Engineering, Clemson University, Clemson, S.C. 29631

D. R. Pitts

Department of Mechanical and Aerospace Engineering, University of Tennessee, Knoxville, Tenn. 37996-2210

J. Fluids Eng 107(1), 23-30 (Mar 01, 1985) (8 pages) doi:10.1115/1.3242435 History: Received May 12, 1983; Online October 26, 2009


The design of air-to-air, thrust augmenting ejectors having short curved wall diffuses utilizing boundary layer control is discussed. The design is achieved by an inverse method which uses the vorticity at the diffuser inlet as a flow parameter in the analysis. Three diffusers having ejector length-to-mixing chamber diameter ratios of approximately 6:1 and mixing chamber inlet area-to-primary nozzle area ratios of 20:1 and 40:1 were designed and tested. A new high level of performance was analytically predicted and achieved experimentally. Comparisons between predicted and observed performances, velocity distributions and pressure distributions are presented.

Copyright © 1985 by ASME
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