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RESEARCH PAPERS

Effects of Curvature on Two-Dimensional Diffuser Flow

[+] Author and Article Information
D. J. Parsons

Westinghouse, Hamilton, Ontario, Canada

P. G. Hill

Queen’s University, Kingston, Ontario, Canada

J. Fluids Eng 95(3), 349-360 (Sep 01, 1973) (12 pages) doi:10.1115/1.3447037 History: Received November 16, 1972; Online October 12, 2010

Abstract

The effects of curvature on diffusers have been studied experimentally and analytically. Measurements of wall pressures and boundary layer velocities have been made in three test diffusers of zero or mild curvature, in which the flow is not separated. The straight diffuser results were in very good accord with the results of flow calculations based on the Stanitz and Moses methods for treating the potential core and boundary layer regions, respectively. The curved diffuser flow measurements indicated pronounced effects of curvature on pressure and velocity distributions. Effects of curvature on boundary layers are ascribed to shear stress modification, and shown to be roughly predictable using a linear mixing length – Richardson number correlation.

Copyright © 1973 by ASME
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