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The evolution of instabilities in the axisymmetric jet. Part 2. The flow resulting from the interaction between two waves

Published online by Cambridge University Press:  21 April 2006

J. Cohen  and
I. Wygnanski
J. Cohen
Affiliation:
Aerospace and Mechanical Engineering Department, University of Arizona, Tucson, AZ 85721, USA Present address: Department of Aeronautics & Astronautics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
I. Wygnanski
Affiliation:
Aerospace and Mechanical Engineering Department, University of Arizona, Tucson, AZ 85721, USA
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Abstract

Leading nonlinear interactions generated by waves externally superimposed on an axisymmetric jet are considered theoretically, and the results verified experimentally. The mean flow in the jet loses its axial symmetry whenever the jet is excited simultaneously by two different azimuthal modes of the same frequency. Subharmonic resonance occurs in this flow whenever the conditions warrant such an occurrence, generating azimuthal modes which may not have been present otherwise in this flow. Some of these resonance conditions are explored.

Information

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 176 , March 1987 , pp. 221 - 235
Copyright
© 1987 Cambridge University Press

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References

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