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On upstream influence in supersonic flows

Published online by Cambridge University Press:  05 September 2005

R. KRECHETNIKOV
Affiliation:
California Institute of Technology, Pasadena, CA 91125, USA
I. I. LIPATOV
Affiliation:
Central Aero-Hydrodynamic Institute, Zhukovsky-3, 140160, Russia

Abstract

The general problem of propagation of three-dimensional disturbances in viscous supersonic flows is considered in the framework of characteristic analysis. Unlike previous results for linear disturbances we deduce a condition determining nonlinear characteristic surfaces which is exact and therefore allows both qualitative and quantitative studies of the speed of propagation as a function of various physical phenomena. These include negative and adverse pressure gradients, and effects of wall cooling and suction–blowing, which are studied in this work as an illustration of the general theory.

Type
Papers
Copyright
© 2005 Cambridge University Press

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