Scholarlink

Abstract <p>The stage-by-stage heterogeneous kinetics of the interaction between dissociated air and the surfaces of β-cristobalite and silicon carbide is used to numerically model the supersonic multicomponent nonequilibrium-dissociated air flow past a cylindrical model within the framework of Navier–Stokes equations with account for chemical reactions in the flow under the conditions of heat transfer experiments in the VGU-4 induction HF plasmatron of the Institute for Problems in Mechanics of the Russian Academy of Sciences. A comparative analysis of the calculated flows in the plasmatron for the materials under consideration is carried out in the case of two characteristic surface temperatures, 849&#xa0;and 1500 K, in a wide range of a parameter characterizing the density of adsorption centers. The contribution of diffusion and heat conduction processes in the heat flux to the surface is determined for different parameters of the interaction between the gas and the surface materials. It is shown that the processes of the nitrogen oxide heterogeneous recombination play the key role in the calculations of the chemical composition of the gas on the surface.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Interaction of Dissociated Air with the Surface of Thermal Protection SiO2 and SiC Materials under Experimental Conditions in an HF Plasmatron

  • 期刊论文

  • 发表日期：

    2026年4月1日

查看全文
  • A. A. Krupnov,
  • M. Yu. Pogosbekian,
  • V. I. Sakharov

摘要

Abstract

The stage-by-stage heterogeneous kinetics of the interaction between dissociated air and the surfaces of β-cristobalite and silicon carbide is used to numerically model the supersonic multicomponent nonequilibrium-dissociated air flow past a cylindrical model within the framework of Navier–Stokes equations with account for chemical reactions in the flow under the conditions of heat transfer experiments in the VGU-4 induction HF plasmatron of the Institute for Problems in Mechanics of the Russian Academy of Sciences. A comparative analysis of the calculated flows in the plasmatron for the materials under consideration is carried out in the case of two characteristic surface temperatures, 849 and 1500 K, in a wide range of a parameter characterizing the density of adsorption centers. The contribution of diffusion and heat conduction processes in the heat flux to the surface is determined for different parameters of the interaction between the gas and the surface materials. It is shown that the processes of the nitrogen oxide heterogeneous recombination play the key role in the calculations of the chemical composition of the gas on the surface.