基于欧拉方法的旋翼翼型结冰数值模拟及参数影响

摘要

从研究二维翼型结冰问题入手,基于水滴流场的概念,采用基于气液两相流的欧拉方法求解水滴流场,得到水滴收集特性,再结合热力学模型数值模拟旋翼翼型结冰过程.通过计算结果和冰风洞试验数据的比较,验证了该方法正确有效.同时研究了气象参数对结冰的影响.基于本文建立的方法,计算分析了飞行速度、平均水滴直径、水滴浓度、温度等不同参数对水滴收集效率、冰型、结冰量、结冰范围的影响,深入地探讨了翼型结冰机理和结冰形成条件,得出气象参数影响特征.%Base on the water droplet flow field conception, the Eulerian two-phase flow model for the air flow containing water droplets is employed to calculate the water droplet collection efficiency. Then the iced progress is simulated with the Gresho thermodynamics model. The calculation result agrees well with the ice wind tunnel experimental data available, indicating that the method is effective. The weather parameters, such as velocity, temperature, MVD, and LWC, are important effect factors on the water droplet collection efficiency, ice accretion, and ice shape. However there is still no comprehensive study on the subject in the open literature. In this paper. The icing progresses and icing conditions are discussed thoroughly by calculating and analyzing the parameters effects, and some useful conclusions about the effect are obtained.