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Local modeling of the aerodynamic heating of the blunt body surface in subsonic high-enthalpy air flow. Theory and experiment on a high-frequency plasmatron

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Abstract

The concept of the local similarity of nonequilibrium boundary layers in high-enthalpy gas flows past blunt bodies is briefly described. The technical possibilities of the VGU-4 induction high-frequency plasmatron in modeling the aerodynamic heating of the hypothetical Pre-X (CNES) spacecraft in the vicinity of the stagnation point of a high-enthalpy air flow are presented. The engineering approach to quantitatively reproduce the thermochemical effect of a dissociated air flow on the vehicle surface in the high-heat region of the terrestrial entry trajectory is developed. In this approach the full-scale values of the total enthalpy, the stagnation pressure, and the velocity gradient at the stagnation point near the surface are reproduced in the experiment. The effective coefficients of O and N atom recombination on a silicone carbide (SiC) surface are determined under the conditions similar with those of the peak heating of the Pre-X vehicle surface in the vicinity of the flow stagnation point.

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Authors and Affiliations

  1. Ishlinsky Institute for Problems in Mechanics of the Russian Academy of Sciences, pr. Vernadskogo 101, Moscow, 119526, Russia

    S. A. Vasil’evskii, A. N. Gordeev & A. F. Kolesnikov

Authors
  1. S. A. Vasil’evskii
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  2. A. N. Gordeev
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  3. A. F. Kolesnikov
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Correspondence to A. F. Kolesnikov.

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Original Russian Text © S.A. Vasil’evskii, A.N. Gordeev, A.F. Kolesnikov, 2017, published in Izvestiya Rossiiskoi Akademii Nauk, Mekhanika Zhidkosti i Gaza, 2017, Vol. 52, No. 1, pp. 160–167.

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Vasil’evskii, S.A., Gordeev, A.N. & Kolesnikov, A.F. Local modeling of the aerodynamic heating of the blunt body surface in subsonic high-enthalpy air flow. Theory and experiment on a high-frequency plasmatron. Fluid Dyn 52, 158–164 (2017). https://doi.org/10.1134/S001546281701015X

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