摘要
基于微团概念,以雨滴运动的基本假设出发,对翼型积冰的拉格朗日方法进行了改进.新方法克服了原方法计算效率低、冰形同雨滴分布密度及网格密度相关的缺点,继承了原方法的鲁棒性,不存在欧拉方法的收敛性问题.为验证方法的正确性,计算了NACA0012翼型在0°和4°攻角下的霜冰积冰情况、表面水收集量和局部撞击系数.结果表明新方法减少了计算量,预测的冰形和实验结果一致,并分析了积冰对气动性能的影响.
An improved numerical method of simulating ice accretion on airfoil was developed based on parcel concept following the fundamental assumption of droplet movement. This method has overcome the shortages of traditional Lagrangian method,such as：low computation efficiency,ice shape dependence on droplet partition density and grid consistency. But,it has also maintained the robustness of original method, without the issue of convergence in Euler method. NACA0012 rime ice accretion,local droplet collection and local impingement efficiency at 0° and 4° AOA （angle of attack） are simulated with this method in order to verify its correctness. The calculated results show that, this improved method contributes to reduce the calculation efforts. The predicted ice shape was consistent with the experimental result,while the effect on aerodynamics of airfoil was also analyzed.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
2007年第11期1814-1819,共6页
Journal of Aerospace Power
关键词
航空
航天推进系统
积冰
数值模拟
撞击极限
气动性能
计算流体力学
aerospace propulsion system
air performance
computation icing simulation
impingement property fluid dynamics （CFD）
作者简介
陈科（1980-），男，四川内江人，博士生，主要从事空气动力学与飞行力学研究．
