Large-scale unsteadiness in a compressible, turbulent reattaching shear layer

Large-scale unsteadiness in a compressible, turbulent reattaching shear layer The large-scale unsteadiness that occurs in shock-wave/boundary layer interactions imposes severe aero-thermo-acoustic loads on high-speed aircraft. Much progress has been made on this problem in the last two decades: these interactions can now be tackled with large eddy simulation, at least for relatively low Reynolds numbers. Further, a large body of evidence now suggests that the physical mechanism for the unsteadiness lies in the selective amplification, within the separated flow, of large-scale disturbances originating in the incoming turbulent flow. The present paper examines the kinematics of these incoming structures in a turbulent boundary layer, and the scaling of the corresponding response of a reattaching shear layer flow. In particular, it presents an overview of the influence on recent research of experimental work carried out by Smits’ group at Princeton University in the 1990s. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Large-scale unsteadiness in a compressible, turbulent reattaching shear layer

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Publisher
Springer Berlin Heidelberg
Copyright
Copyright © 2015 by • Springer-Verlag Berlin Heidelberg (outside the USA)
Subject
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-015-2064-x
Publisher site
See Article on Publisher Site

Abstract

The large-scale unsteadiness that occurs in shock-wave/boundary layer interactions imposes severe aero-thermo-acoustic loads on high-speed aircraft. Much progress has been made on this problem in the last two decades: these interactions can now be tackled with large eddy simulation, at least for relatively low Reynolds numbers. Further, a large body of evidence now suggests that the physical mechanism for the unsteadiness lies in the selective amplification, within the separated flow, of large-scale disturbances originating in the incoming turbulent flow. The present paper examines the kinematics of these incoming structures in a turbulent boundary layer, and the scaling of the corresponding response of a reattaching shear layer flow. In particular, it presents an overview of the influence on recent research of experimental work carried out by Smits’ group at Princeton University in the 1990s.

Journal

Experiments in FluidsSpringer Journals

Published: Nov 3, 2015

References

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