摘要
采用CFX软件,利用SST k-ω湍流模型,同时引入了辐射模型考虑热辐射的影响。采用CFX的共轭传热方法,在流体域求解N-S方程,固体域求解热传导方程,然后在流固耦合交界处交换数据,实现了流场与结构温度场的耦合数值分析。为了验证此方法的正确性,对文献中轴对称喷管进行了数值模拟,所得喷管壁温与试验数据吻合良好;另外进行了高超声速钝体流场与结构温度场的耦合计算,计算所得激波位置与试验结果一致,固壁非定常温度场分布与文献结果吻合。在此基础上,进行了航空发动机短舱内外流场与结构温度场耦合的数值研究,并得出了几个短舱外表面蒙皮冷却的可行性措施,为飞行器红外隐身设计提供参考。
In this paper, the CFX software and the SST turbulent model are used in the numerical simulation and the radiation energy are considered in the simulation. To simulate the coupling problems of fluid and solid, the numerical models of the CFX＇s Conjugate Heat Transfer have been developed considering both solid and fluid regions. Each region provides a boundary condition for the other. There are two examples to validate the method. The first one is about an axisymmetrie nozzle. The temperature of the nozzle wall is simulated and computed results are validated with experimental date. The second one is about a hypersonic fluid-solid thermally coupled flow around a cylinder. The unsteady temperature of the solid field and the shock of the fluid field are simulated. The results are compared with the experimental date and computational results from the reference. Furthermore, the internal and external flow field and temperature distribution of the cabin of aircraft are simulated. The simulation results have provided reference to the infrared stealth design.
出处
《飞机设计》
2009年第1期30-36,共7页
Aircraft Design
