论文部分内容阅读
为了准确地预测机翼防冰系统热载荷,对二维机翼防冰表面溢流水流动状态进行了仿真计算.依据剪切力驱动模型,分别推导了水膜破裂前后的速度分布;引入能量最低原理,推导了溪状流模型,运用数值方法对水膜破裂的临界厚度进行了求解;使用基于Fluent软件的用户自定义函数方法编程并加载计算模块,分别以水膜模型和溪状流模型计算得到了溢流水的流动特性.结果表明:在一定结冰条件下,引入溪状流模型后,溢流水的溢流范围在两个不同算例中分别增大了33%和17%,这会很大程度影响防冰系统热载荷的分布.
In order to accurately predict the thermal load of the ice-wing anti-icing system, the flow field of two-dimensional anti-icing surface anti-icing fluid was simulated.According to the shear-driven model, the velocity distributions before and after the water film rupture were deduced respectively. Principle, the stream flow model is deduced, and the critical thickness of the water film rupture is solved by numerical method. The user-defined function method based on Fluent software is used to program and load the calculation module. The water film model and the stream flow model are used respectively The flow characteristics of overflowed water were obtained.The results show that the overflow of overflowed water increases by 33% and 17% respectively in two different cases under the condition of icing, Greatly affect the distribution of anti-icing system thermal load.