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RESEARCH PAPERS

The Laminar Boundary Layer on a Rotating Circular Arc Blade

[+] Author and Article Information
R. M. Halleen

Thermosciences Division, Department of Mechanical Engineering, Stanford University, Stanford, Calif.

J. P. Johnston, W. C. Reynolds

Thermoscience Division, Department of Mechanical Engineering, Stanford University, Stanford, Calif.

J. Basic Eng 88(1), 111-120 (Mar 01, 1966) (10 pages) doi:10.1115/1.3645782 History: Received July 30, 1965; Online November 03, 2011

Abstract

The primary objective was to develop an exact solution to the simplest possible laminar boundary-layer problem for a curved rotating blade. It was formulated initially so that the results might be used to illuminate some of the characteristics of boundary-layer behavior on centrifugal impeller blades. The solution was obtained by a perturbation technique and the results compared to existing approximate solutions and related exact solutions. A primary result shows that rotation itself may induce laminar boundary-layer separation on a blade trailing face in the absence of free-stream, longitudinal adverse pressure gradients. This result is then interpreted to show that such a separation may become important for impellers of low ReD = ût D/ν; i.e., when ReD ≤ 900.

Copyright © 1966 by ASME
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