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Influence of the Entropy Layer on Turbulence Transition of the Supersonic Boundary Layer in the Wake with Isolated Roughnesses

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Abstract—

The influence of the entropy layer generated by a small bluntness of the flat plate leading edge on laminar-turbulent supersonic boundary layer transition in the wake behind isolated roughness elements located on the plate surface is studied when the bluntness radius is varied. The experiments are carried out at the Mach number M = 6 over the Reynolds number range (0.4–2.3) × 106. The Reynolds number is calculated on the basis of the free-stream parameters at the point of roughness. The well-known correlation dependences are verified and the transition criterion is estimated.

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Funding

The work was carried out in TsAGI with support from the Russian Science Foundation (project no. 17-79-10433). The calculations were carried out on the base of codes developed in Moscow Institute of Physics and Technology with support from the Russian Science Foundation (project no. 19-79-10132) and adapted for the aims of the present study.

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Authors and Affiliations

  1. Zhukovsky Central Aerohydrodynamic Institute (TsAGI), Zhukovsky, Moscow region, Russia

    I. O. Pogorelov & P. V. Chuvakhov

  2. Moscow Physico-Technical Institute (State University), Dolgoprudnyi, Moscow region, Russia

    I. O. Pogorelov & P. V. Chuvakhov

Authors
  1. I. O. Pogorelov
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  2. P. V. Chuvakhov
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Correspondence to I. O. Pogorelov or P. V. Chuvakhov.

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Translated by E.A.Pushkar

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Pogorelov, I.O., Chuvakhov, P.V. Influence of the Entropy Layer on Turbulence Transition of the Supersonic Boundary Layer in the Wake with Isolated Roughnesses. Fluid Dyn 55, 597–603 (2020). https://doi.org/10.1134/S0015462820050110

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  • DOI: https://doi.org/10.1134/S0015462820050110

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