Coherent Structures in a Three-Dimensional Wall Jet

[+] Author and Article Information
Hisashi Matsuda

Research & Development Center, Toshiba Corporation, Kawasaki 210, Japan

Sei-ichi Iida, Michio Hayakawa

Department of Mechanical Engineering II, Hokkaido University, N13 W8, Sapporo 060, Japan

J. Fluids Eng 112(4), 462-467 (Dec 01, 1990) (6 pages) doi:10.1115/1.2909428 History: Received June 12, 1989; Online May 23, 2008


The formation mechanism of streamwise vortices in the near field of the three-dimensional wall jet discharging from a circular nozzle along a flat plate is studied experimentally using a conditional sampling technique. Ensemble-averages of the lateral velocity component indicate the presence of large-scale horseshoe-like structures, whose legs are inclined and stretched to form the streamwise vortices in the mixing region of the jet. Based on the present result, a coherent structure model for the near field of the wall jet is proposed.

Copyright © 1990 by The American Society of Mechanical Engineers
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