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RESEARCH PAPERS

Further Experiments With Suction at a Sudden Enlargement in a Pipe

[+] Author and Article Information
Gunnar Heskestad

Research and Development Center, American Standard, Inc., New Brunswick, N. J.

J. Basic Eng 92(3), 437-447 (Sep 01, 1970) (11 pages) doi:10.1115/1.3425025 History: Received August 01, 1969; Online October 27, 2010

Abstract

Previously reported experiments on incompressible flow through a step expansion in a pipe, as influenced by suction at the smaller diameter of the step, have been extended to examine effects of inlet flow on suction requirements and performance of the device as a (short) diffuser. Here the performance for a fully developed turbulent pipe flow is considered and compared to previous results for an inlet flow with thin boundary layer. Whenever overall diffuser length is restricted to values less than some upper limit for a given expansion ratio, then for either inlet flow condition, the present device is shown to produce higher pressure recoveries (adjusted for suction power) than conical diffusers.

Copyright © 1970 by ASME
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