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针对机翼结冰问题,利用欧拉法求解空气水滴两相流流场,通过Fluent软件用户自定义函数功能编程求解三维机翼表面水滴局部收集系数以及结冰情况。在计算中,将水溢流方向沿机翼弦向和展向分解,以此对Messinger结冰热力学模型进行改进,使之更符合三维情况,并在此基础上进行三维传质传热分析;修正传统的二维表面对流换热系数求解方法,得到求解三维表面对流换热系数的改进方法。采用沿壁面法向结冰的方式进行冰生长计算,通过与国外冰风洞试验结果及结冰计算软件LEWICE结果的比较,证明本文三维结冰计算方法是正确的。
Aiming at the problem of wing icing, Euler method was applied to solve the flow field of air-water two-phase flow. The local collection coefficient of water droplet on the surface of three-dimensional wing and the icing condition were solved by Fluent software user-defined function programming. In the calculation, the direction of water overflow is decomposed along the chord and the span of the wing to improve the Messinger icing thermodynamic model to make it more in line with the three-dimensional situation. On this basis, the three-dimensional mass and heat transfer analysis is carried out. The method of solving the traditional two-dimensional surface convective heat transfer coefficient is modified, and an improved method of solving three-dimensional surface convective heat transfer coefficient is obtained. The ice growth was calculated by normal icing along the wall. Compared with the ice ice test in foreign countries and the results of LEWICE icing calculation software, it is proved that the calculation method of icing in 3D is correct.