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DETERMINATION OF MATERIAL CATALYCITY AT HIGH TEMPERATURES IN THE VAT-104 HYPERSONIC WIND TUNNEL

Volume 45, Issue 1, 2014, pp. 3-20
DOI: 10.1615/TsAGISciJ.2014011332
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ABSTRACT

Nitrogen and airflows in a duct of the VAT-104 high-temperature wind tunnel are modeled by means of the numerical solution to the unsteady two-dimensional Navier−Stokes equations in wide ranges of the total pressure (1−40 kPa) and stagnation temperature (5500−8000 K). Parametric numerical studies of nonequilibrium heat transfer on the end face of a thermally insulated circular cylinder at different cylinder surface catalycity values are performed. For each flow regime, the dependence of the surface temperature on the heterogeneous recombination rate constant Kw is obtained and the derivative α = dTw /dKw is determined. The catalycity of the C−SiC thermoprotective material in nitrogen and air plasma flows at surface temperatures of Tw = 1500−1900 K is determined in the calculations and experiments based on the measured temperature differences of the reference and examined materials.

CITED BY
  1. Vaganov A. V., Zhestkov B. E., Lyamin Yu. B., Poilov V. Z., Pryamilova E. N., Methodology of investigation of ultra high temperature ceramics thermochemical stability and catalycity, 1770, 2016. Crossref

  2. Gordeev A. N., Kolesnikov A. F., Sakharov V. I., Experimental and Numerical Investigation of Heat Exchange between Underexpanded High-Enthalpy Air Jets and Cylindrical Models, Fluid Dynamics, 53, 5, 2018. Crossref

  3. Mosolov S.V., Partola I.S., Kudinov A.S., Yurchenko I.I., Klimenko A.G., Fedorov S.A., Simulation of intense heat-power effect of a gas environment for testing samples in a wide range of parameters, Engineering Journal: Science and Innovation, 12 (108), 2020. Crossref

  4. Astapov Alexey, Rabinskiy Lev, Tushavina Olga, Oxidation Resistance of a Si–TiSi2–MoSi2–TiB2–CaSi2 Coating on a Cf/C–SiC Substrate in High-Speed High-Enthalpy Air Plasma Flows, Nanomaterials, 11, 10, 2021. Crossref

  5. Astapov A.N., Zhestkov B.E., Pogozhev Yu.S., Zinovyeva M.V., Potanin A.Yu., Levashov E.A., The oxidation resistance of the heterophase ZrSi2-MoSi2-ZrB2 powders – Derived coatings, Corrosion Science, 189, 2021. Crossref

  6. Kolesnikov A. F., Vasil’evskii S. A., Shchelokov S. L., Chaplygin A. V., Galkin S. S., Analysis of the Possibilities of Local Simulation of Aerodynamic Heating in a Powerful VGU-3 HF-Plasmatron, Fluid Dynamics, 57, 6, 2022. Crossref

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