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RESEARCH PAPERS

Performance of Conical Diffusers With Annular Injection at Inlet

[+] Author and Article Information
W. B. Nicoll, B. R. Ramaprian

Department of Mechanical Engineering, University of Waterloo, Waterloo, Ontario, Canada

J. Basic Eng 92(4), 827-835 (Dec 01, 1970) (9 pages) doi:10.1115/1.3425153 History: Received February 25, 1970; Online October 27, 2010

Abstract

Data on the gross performance of conical diffusers subjected to annular secondary injection at inlet are reported. Tests indicate that the improvement in diffuser performance is significant even at moderate rates of injection. The effects of injection rate and diffuser geometry on the pressure recovery and stall are discussed. An analytical method based on the solution of the boundary layer equations by the Patankar-Spalding finite difference method has been used to obtain predictions of pressure recovery with inlet injection. The predictions compare well with the experimental results.

Copyright © 1970 by ASME
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