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RESEARCH PAPERS

Experimental Investigation of Subsonic Turbulent Flow Over Single and Double Backward Facing Steps

[+] Author and Article Information
D. E. Abbott

V dya Inc., Palo Alto, Calif.

S. J. Kline

Stanford University, Stanford, Calif.

J. Basic Eng 84(3), 317-325 (Sep 01, 1962) (9 pages) doi:10.1115/1.3657313 History: Received February 07, 1961; Online November 04, 2011

Abstract

Results are presented for flow patterns over backward facing steps covering a wide range of geometric variables. Velocity profile measurements are given for both single and double steps. The stall region is shown to consist of a complex pattern involving three distinct regions. The double step contains an assymmetry for large expansions, but approaches the single-step configuration with symmetric stall regions for small values of area ratio. No effect on flow pattern or reattachment length is found for a wide range of Reynolds numbers and turbulence intensities, provided the flow is fully turbulent before the step.

Copyright © 1962 by ASME
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