中文摘要：

为了对超高空低速飞行器的热环境特性进行分析，建立了超高空低速飞行器的热环境分析模型．通过数值模拟研究了热辐射和对流对超高空低速飞行器热环境特性的影响．研究结果表明，飞行器表面吸收一辐射比越大，气流速度对超高空低速飞行器热效应的影响越大；飞行器表面辐射物性的变化可使飞行器蒙皮温度改变70K．热辐射和对流换热均对飞行器的热特性有重要影响，飞行器蒙皮温度存在非均匀性并随时间变化．

英文摘要：

A thermal model was established to analyze the thermal environment characteristics of low-speed aircrafts at extremely high altitude. Effects of thermal radiation and convection on thermal environment characteristics of low-speed aircrafts at extremely high altitude were analyzed by using numerical simulation. The results show that the influence of airflow velocity on the thermal characteristics is strengthened with the increase of the ratio of absorptivity to emissivity, and the variation of envelop temperature with the airflow change can reach 70 K. It is found that both thermal radiation and heat convection have significant influence on the thermal characteristics of low-speed aircrafts at extremely high altitude and the envelope temperature is non-uniform and varies with time.