摘要
提出了一种考虑过冷水滴飞溅和反弹效应的欧拉方法,利用此方法对翼型进行积冰数值模拟。通过求解气体相得到空气流场的速度分布,在速度分布的基础上得到水滴流场,进而得到积冰表面的水滴收集率,通过对积冰表面的每一个控制体求解积冰模型得到积冰量。过冷大水滴效应需要特定的飞溅和反弹模型来描述,通过在水滴控制方程中加入源项,并在物面边界处激活对应的源项来模拟过冷大水滴的飞溅和反弹效应。将计算结果和文献中的数据进行对比,结果显示,过冷大水滴情况下考虑飞溅和反弹效应后,计算结果得到了很大的改进,表明飞溅和反弹模型能够很好的模拟水滴和结冰表面的作用机理和二次撞击现象,也证明了飞溅和反弹模型的有效性和可用性。
An Eulerian method that takes into account splashing and rebound effects to numerically simulate ice accretion on airfoils based on structure grid has been proposed. The gas phase is calculated with computational fluid dynamics method, the governing equations of droplet phase are solved based on the velocity of the gas phase to obtain the water collection efficiency on the ice accreting surface. The amount of ice that accretes on the ice accreting surface is calculated by solving the icing model for control volumes along the ice accreting surface, the icing model developed is based on the work of Messinger＇s. Of special interest in present study is the Supercooled Large Droplets （SLD）, the simulation of SLD effects requires specific splashing model and rebound model, the splashing and rebound effects are accounted for by adding source terms into the governing equations of droplet phase. Computational results of present study are compared with predicted and experimental data in the literature, for large droplets the splashing model is a significant improvement compared with the experimental measurements, which indicates that the methods, splashing and rebound model proposed are feasible and effective.
出处
《空气动力学学报》
CSCD
北大核心
2013年第6期801-811,共11页
Acta Aerodynamica Sinica
关键词
SLD
积冰生成
飞溅模型
反弹模型
多段翼
SLD ice accretion
splashing model
rebound model
multi-element airfoil
