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Instabilities in the slit-jet flow field

Published online by Cambridge University Press:  20 April 2006

J. F. Foss  and
D. Korschelt
J. F. Foss
Affiliation:
Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan 48824
D. Korschelt
Affiliation:
Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan 48824 Present address: Brown Boveri & Cie, TCT-2, Gas Turbine Dept, CH-5401 Baden, Switzerland.
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Abstract

Three modes of instabilities in the slit-jet flow field are recognized. Additional evidence for the universality of the Strouhal number for the second mode ST = fw/U0 ≈ 0.43 and additional information on the wavelength (λ) between, and convection speed uc of the symmetrically placed, large-scale motions that result from this instability are presented. Specifically λ/w ≈ 1.2 and uc/U0 ≈ 0.51. The third instability mode is initiated at a Reynolds number U0w/v of approximately 1600; this instability results in a loss of the regular pattern associated with the large-scale motions.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 132 , July 1983 , pp. 79 - 86
Copyright
© 1983 Cambridge University Press

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References

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