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Stabilization of a hypersonic boundary layer using a felt-metal porous coating

Published online by Cambridge University Press:  25 March 2015

R. C. Tritarelli ,
S. K. Lele  and
A. Fedorov
R. C. Tritarelli*
Affiliation:
Institute of Fluid Dynamics, ETH Zürich, 8092 Zurich, Switzerland Department of Aeronautics and Astronautics, Stanford University, Stanford, CA 94305, USA
S. K. Lele
Affiliation:
Department of Aeronautics and Astronautics, Stanford University, Stanford, CA 94305, USA
A. Fedorov
Affiliation:
Moscow Institute of Physics and Technology, Zhukovski, 140180, Russia
*
†Email address for correspondence: tritarelli@ifd.mavt.ethz.ch
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Abstract

An error in the complex representation of the porous-coating model used in the study by Fedorov et al. (J. Fluid Mech., vol. 479, 2003, pp. 99–124), investigating the stabilization effect of ultrasonically absorptive coatings on hypersonic boundary layers, is pointed out and corrected. This error has been acknowledged by Fedorov et al. (J. Fluid Mech., vol. 769, 2015, pp. 725–728). The corrected version of the erroneous linear stability results of the original work is presented and previously made conclusions are reassessed. The novel numerical results indicate that second-mode instabilities are shifted to lower frequencies on felt-metal porous coatings, similar to the behaviour observed on porous coatings with regular microstructure.

JFM classification

Boundary Layers: Boundary layer control Boundary Layers: Boundary layer stability Aerodynamics: High-speed flow
Type
Papers
Information
Journal of Fluid Mechanics , Volume 769 , 25 April 2015 , pp. 729 - 739
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Copyright
© 2015 Cambridge University Press 

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