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RESEARCH PAPERS

The Effect of Inlet Turbulence Intensity on the Reattachment Process Over a Backward-Facing Step

[+] Author and Article Information
K. Isomoto

Advanced Engineering Department, Civil Aero-Engine Development Div., IHI Co., Ltd., Tanashi, Tokyo, 188 Japan

S. Honami

Mechanical Engineering Dept., Science University of Tokyo, Kagurazaka, Shinjuku, Tokyo, 162 Japan

J. Fluids Eng 111(1), 87-92 (Mar 01, 1989) (6 pages) doi:10.1115/1.3243604 History: Received September 22, 1987; Online October 26, 2009

Abstract

Behavior of a separated shear layer over a backward-facing step and its reattachment is presented when a two-dimensional cavity or rod is installed upstream of the step in order to change local turbulence intensity in addition to grid turbulence in the free-stream. The reattachment length has a strong negative correlation with maximum turbulence intensity near the wall at the separation point. Turbulence in the entrainment region immediately downstream of the step plays an important role in determining the reattachment length.

Copyright © 1989 by ASME
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