平流层飞艇驻空过程中热力学特性及影响因素研究

Research on Thermal Performance of a Stratospheric Airship at High-Altitude Station-Keeping Conditions

基于平流层环境特点,分析了影响平流层飞艇热平衡的基本热源和换热途径,建立了平流层飞艇气囊冷热面以及内部氦气之间热平衡仿真模型,并在此基础上对某概念飞艇进行了仿真分析,得出了飞艇气囊冷热面以及内部氦气随时间变化规律;采用定量分析方法,重点分析了太阳辐射吸收率、红外辐射发射率以及空速等因素对氦气温度变化的影响程度及氦气温度随其变化的关系。计算结果表明,所建立的模型可较好的描述各因素对氦气温度的影响,可为平流层飞艇总体设计提供依据。

Based on the characteristics of stratospheric environment ,this paper analyzes heat sources and heat exchange patterns that affect thermal balance and thermal performance of stratospheric airships .And thermal simulation program is developed about it .Simulation of a concept stratospheric airship is carried out ,and the varying laws of temperature are drawn with Matlab platform .The relationship between the he‐lium temperature and factors ,such as solar radiation infrared radiation and surround air speed ,is analyzed by using the method of quantitative analysis .The simulation results suggest that the model can exactly de‐scribe the influences of each factor on helium temperature ,and thus making itself a theoretical basis for the overall design of stratospheric airship .