一种飞机机翼表面结冰过程仿真方法

提出了一种适用于各种结冰气象条件下飞机机翼结冰过程的数值模拟方法。在对水滴撞击区内的机翼表面划分微元控制体进行传热传质分析的基础上,通过合理的冰生长方式,利用流场计算软件FLUENT的动网格模型和用户自定义函数(UDF)对机翼表面的结冰过程进行了模拟;将计算得到的局部收集系数和冰型与国外文献计算结果进行了对比,验证了该方法的正确性和通用性;比较了两种冰生长方式得到的局部收集系数和冰型,结果表明使用冰层沿结冰表面法向的冰生长方式更合理;比较了完全冻结和存在溢流情况的冰型,结果表明不考虑局部收集系数的变化得到的两者的冰型基本一致。

Simulation Approach of Ice Accretion on Airfoil Surface

A numerical simulation approach was presented to simulate the ice accretion on airfoil, which dealt with the way of ice accretion under various atmospheric conditions. Based on conservation of mass and energy in a set of determined control volumes, ice accretion was simulated with dynamic mesh model and user defined function (UDF) in FLUENT in proper ice growing mode. Agreement of the results of local collection efficiencies and simulated ice shape with those of reference shows that the method is correct and general. The comparison of results of two ice growing mode shows it is more logical that the ice is accreted along the normal of the iced surface. While local collection efficiencies are constant, the ice shape with no water running along the surface is very similar to that with water running along the surface.