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RESEARCH PAPERS

Turbulent Boundary Layers in Diffusers Exhibiting Partial Stall

[+] Author and Article Information
H. L. Moses

Massachusetts Institute of Technology, Cambridge, Mass.

J. R. Chappell

Newport News Shipbuilding & Dry Dock Co., Newport News, Va.

J. Basic Eng 89(3), 655-663 (Sep 01, 1967) (9 pages) doi:10.1115/1.3609678 History: Received July 29, 1966; Online November 03, 2011

Abstract

An investigation of turbulent boundary-layer separation in internal flow is presented, with experimental results for a variable angle, two-dimensional diffuser. A simple analytical model is adopted, which consists of wall boundary layers and a one-dimensional, inviscid core. By calculating the pressure simultaneously with the boundary-layer development, the approximate method is extended to include the separated region. With a limited amount of separated flow, the calculated pressure recovery agrees reasonably well with the experiments and gives a fair indication of maximum diffusion performance. The limitation of the model, as well as the possibility of singularities and downstream instability, are discussed in relation to the general problem of boundary-layer separation.

Copyright © 1967 by ASME
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