平流层飞艇强迫对流特性数值仿真分析

强迫对流换热特性对平流层飞艇热状态有重要影响。以平流层飞艇流线型封闭囊体为研究对象，基于囊体内部纯导热传热的假设，采用计算流体力学方法建立平流层飞艇外部流场三维数值模型，对飞艇外部强迫对流换热特性进行仿真分析，得到了不同太阳照射角度、风速和攻角条件下的飞艇表面温度分布和内部平均温度变化规律，为平流层飞艇热状态预测和热控设计提供参考依据。
During the floating flight, the complex radiation-convection environment remarkably affects the flight performance and security of the stratospheric airship. The forced convection around the stratospheric airship plays an important role in the thermal behavior of the airship. Based on the hypothesis of pure heat conduction inside the airship, a three dimensional CFD model of stratospheric airships was developed and the thermal characteristics of the forced convective heat transfer of the airship were investigated. The distributions of the temperature of skins of the airship and the average temperature of the inner gas were calculated with the variation of the angle of the sun, the wind velocity and the angle of attack. Simulation results can be referenced for the accurate prediction of the thermal behavior of stratospheric airships.