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Local temperature perturbations of the boundary layer in the regime of free viscous–inviscid interaction

Published online by Cambridge University Press:  24 July 2012

M. V. Koroteev  and
I. I. Lipatov
M. V. Koroteev*
Affiliation:
Physics and Biology Unit, Okinawa Institute of Science and Technology, Tancha 7542, Onna, Okinawa, Japan
I. I. Lipatov
Affiliation:
Central Aerohydrodynamics Institute, Zhukovsky, 140180, Russia
*
†Email address for correspondence: maxim.koroteev@oist.jp
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Abstract

We analyse the disturbed flow in the subsonic laminar boundary layer, disturbances being generated by local heating elements, which are placed on the surface. It is exhibited that these flows are described in terms of free interaction theory for specific sizes of thermal sources. We construct the numerical solution for the case of a flat subsonic stream in the viscous asymptotic layer, in which the flow is described by nonlinear equations for vorticity, temperature and an interaction condition which provides the influence of perturbations to the pressure in the main order. The obtained solutions are compared with those for corresponding linear problems with small perturbations. It is demonstrated that strong temperature perturbations in some situations allow us to obtain the flow close to the separated flow.

JFM classification

Boundary Layers: Boundary layer structure Boundary Layers: Boundary layer control
Type
Papers
Information
Journal of Fluid Mechanics , Volume 707 , 25 September 2012 , pp. 595 - 605
Copyright
Copyright © Cambridge University Press 2012

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