Entrainment of Self-Sustained Flow Oscillations: Phaselocking or Asynchronous Quenching?

[+] Author and Article Information
T. Staubli

Hydraulic Research and Development, Sulzer Escher Wyss Ltd., Zürich, Switzerland

J. Appl. Mech 54(3), 706-712 (Sep 01, 1987) (7 pages) doi:10.1115/1.3173093 History: Received January 23, 1986; Online July 21, 2009


Asynchronous quenching and phaselocking are two different mechanisms leading to the onset of synchronization of flow instabilities with externally excited oscillations. Experimental evidence for asynchronous quenching as well as for phaselocking is given from response measurements of representative pressures, velocities, or of forces for the following types of flow - forcing interactions: an oscillating circular cylinder in crossflow; interaction of an unstable, planar jet with an oscillating leading edge; a forced mixing layer between parallel streams; and a thermally forced cavity shear-layer.

Copyright © 1987 by ASME
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