Self-Excited Shear-Layer Oscillations in a Multi-Cavity Channel With a Steady Mean Velocity

[+] Author and Article Information
K. D. Stephanoff

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015

J. Fluids Eng 108(3), 338-342 (Sep 01, 1986) (5 pages) doi:10.1115/1.3242583 History: Received August 07, 1985; Online October 26, 2009


Self-excited shear-layer oscillations are observed in the cavity flows of a multi-cavity channel when the mean velocity through the channel exceeds a critical value. These coherent shear-layer oscillations appear as one or sometimes two selectively-amplified frequencies in the Fourier-analyzed signals of hot-film gauges that are sintered into the channel walls. At a constant velocity above the critical velocity, the self-excited oscillations are present in only a few cavities. Downstream from these cavities there are oscillations in the cavity flows but one or two selectively-amplified frequencies are not observed. The self-excited oscillations move upstream and the selectively-amplified frequency increases as the mean velocity through the channel is increased.

Copyright © 1986 by ASME
Your Session has timed out. Please sign back in to continue.





Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In