For the new generation of space vehicles with a reusable heat shield, it is promising to use carbon-ceramic composite materials resistant to powerful heat flows arising by the descent of such a vehicle in the atmosphere. This paper presents the results of the theoretical forecast of characteristics of a heat shield from a porous carbon–ceramic composite made on the basis of testing specimens of this composite on a gas-dynamic stand simulating real operating conditions of the heat shield. Methods have been developed for simulating the heating and ablation of specimens of carbon–ceramic composites under their convective heating in a plasmatron. It has been established that the diameter of the nozzle of the gas-discharge channel of the plasmatron and its distance to the frontal surface of the specimen influence the temperature regime of tests. We propose an experimental procedure for attaining a temperature of 273 K on the frontal surface of a cylindrical specimen of a carbon–ceramic composite material of diameter 70 mm and height 70 mm.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 92, No. 1, pp. 93–99, January–February, 2019.
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Reznik, S.V., Prosuntsov, P.V. & Mikhailovskii, K.V. Development of Elements of Reusable Heat Shields from a Carbon–Ceramic Composite Material 1. Theoretical Forecast. J Eng Phys Thermophy 92, 89–94 (2019). https://doi.org/10.1007/s10891-019-01910-0
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DOI: https://doi.org/10.1007/s10891-019-01910-0