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On linear instability mechanisms in incompressible open cavity flow

Published online by Cambridge University Press:  04 July 2014

F. Meseguer-Garrido*
Affiliation:
School of Aerospace Engineering, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain
J. de Vicente
Affiliation:
School of Aerospace Engineering, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain
E. Valero
Affiliation:
School of Aerospace Engineering, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain
V. Theofilis
Affiliation:
School of Aerospace Engineering, Universidad Politécnica de Madrid, Plaza Cardenal Cisneros 3, E-28040 Madrid, Spain
*
Email address for correspondence: fernando.meseguer@upm.es

Abstract

A theoretical study of linear global instability of incompressible flow over a rectangular spanwise-periodic open cavity in an unconfined domain is presented. Comparisons with the limited number of results available in the literature are shown. Subsequently, the parameter space is scanned in a systematic manner, varying Reynolds number, incoming boundary-layer thickness and length-to-depth aspect ratio. This permits documenting the neutral curves and leading eigenmode characteristics of this flow. Correlations constructed using the results obtained collapse all available theoretical data on the three-dimensional instabilities.

Type
Papers
Copyright
© 2014 Cambridge University Press 

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