热防护发汗冷却控制
Transpiration Cooling Control of Thermal Protection
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摘要: 发汗冷却是热防护的重要手段.本文提出发汗冷却控制模型.利用有限元的受热平衡, 推导出可变域中发汗控制微分方程式.在非烧蚀情况下,采用氦作为发汗剂对方程式进行了 验证.计算结果表明,该数学模型符合实际物理过程,并为该类型的分布参数系统的理论研究 提供了数值依据.Abstract: Transpiration cooling is an important means of thermal protection. A transpiration control model is presented in this paper. By malting use of heat balance of finite elements in variable domain a differential equation of control has been derived. Numerical calculation of the equation is performed with ammonia used as coolant under nonablation condition.The result shows that this mathematical model exactly agrees with the true physical process and provides a numeral basis for the theoretical research of this type of distributed parameter systems.
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