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Experimental study of the effect of a passive porous coating on disturbances in a hypersonic boundary layer 2. Effect of the porous coating location

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Abstract

The effect of the location of a passive porous coating on natural disturbances in a hypersonic boundary layer is studied experimentally. The experiments are performed in the flow around a sharp cone aligned at a zero angle of attack with the free-stream Mach number M∞ = 5.8, stagnation temperature T 0 = 370 ± 5 K, and unit Reynolds numbers Re1∞ = 2.6 · 106, 4.6 · 106, 6.6 · 106, and 107 m−1. The wave characteristics of the boundary layer are calculated with the use of the linear stability theory for flow parameters corresponding to experimental values. A comparison of experimental and predicted results shows that the presence of a porous coating in the region where the second mode is unstable leads to reduction of its amplitude at the measurement point, whereas the presence of a porous coating in the region of second mode stability leads to enhancement of the amplitude.

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Authors and Affiliations

  1. Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    S. V. Lukashevich, S. O. Morozov & A. N. Shiplyuk

  2. Novosibirsk State University, Novosibirsk, 630090, Russia

    S. O. Morozov

  3. Novosibirsk State Technical University, Novosibirsk, 630073, Russia

    A. N. Shiplyuk

Authors
  1. S. V. Lukashevich
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  2. S. O. Morozov
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  3. A. N. Shiplyuk
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Correspondence to S. V. Lukashevich.

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__________

Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 57, No. 5, pp. 127–133, September–October, 2016.

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Lukashevich, S.V., Morozov, S.O. & Shiplyuk, A.N. Experimental study of the effect of a passive porous coating on disturbances in a hypersonic boundary layer 2. Effect of the porous coating location. J Appl Mech Tech Phy 57, 873–878 (2016). https://doi.org/10.1134/S002189441605014X

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  • DOI: https://doi.org/10.1134/S002189441605014X

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