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首页> 外文期刊>Journal of Spacecraft and Rockets >Simulation of Outgassing Processes in Spacecraft Coatings Induced by Thermal Vacuum Influence
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Simulation of Outgassing Processes in Spacecraft Coatings Induced by Thermal Vacuum Influence

机译：热真空影响引起的航天器涂层脱气过程的模拟

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摘要

The mathematical models describing the outgassing processes and deposition of volatile products under thermal vacuum exposure to coatings applied to space vehicles are given. The models are based on assumptions that changes of outgassing product concentrations in material under investigation take place as a result of desorption from surface on the material-vacuum boundary, first-order chemical reactions, and diffusion specified by the aforesaid processes, and that a part of the surface deposited mass reevaporates. Analytical expressions for the space-time distribution of outgassing products in material and dependence of mass deposited on unit surface on time were obtained from the model equations for the influence of individual processes on outgassing and deposition kinetics to be investigated numerically. According to the obtained results, an analysis of how parameters of the model, separate and in combination, exert influence on alteration of outgassing product concentrations, on outgassing, and deposition kinetics has been carried out.
机译：给出了描述脱气过程和挥发性产物在热真空下暴露于航天器涂层的数学模型。该模型基于以下假设：所研究材料中的脱气产物浓度发生变化是由于材料-真空边界上的表面脱附，一阶化学反应和上述过程指定的扩散所致，并且一部分表面沉积的物质中的一部分重新蒸发。从模型方程获得了排气产物在材料中的时空分布以及沉积在单位表面上的质量对时间的依赖性的解析表达式，该方程式对各个过程对排气和沉积动力学的影响进行了数值研究。根据获得的结果，分析了模型的参数（分离和组合）如何影响除气产物浓度的变化，对除气和沉积动力学的影响。

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