直升机机身表面温度场建模与数值分析

为了解得合理的直升机整机温度分布,在直升机机身表面温度场建模中综合考虑了机身蒙皮、排气系统、旋翼下洗和太阳辐射等方面的影响,并进行了数值模拟和排气系统-后机身一体化局部缩比模型的实验验证.研究结果表明:①由于辐射换热的影响,后机身内部混合管附近的表面温度升高了15 K左右;②单层蒙皮的表面温度受内部高温部件的热辐射影响...

Modeling and Analysis of Helicopter Skin Temperature Distribution

In order to acquire helicopter skin temperature distribution, practical ways of modeling the helicopter skin, exhaust system, rotor downwash and solar irradiance are introduced in simulation. A numerical study is conducted and an integrative exhaust system-tail airframe scaled model is tested. The results show that: 1) because of radiation transfer, the temperature on the tail airframe skin around the mixing nozzle is about 15 K higher than the ambient temperature; 2) the temperature distribution on the single-wall skin is seriously affected by inner hot sources, while the temperature on the double-wall skin with radiation-resistance is close to ambient temperature; 3) the temperature on the direct solar irradiance side of the helicopter body is obviously higher than on the other side; the temperature increase is about 18 K in certain areas.