基于概率反弹碰撞模型的进气粒子分离器两相流数值模拟

通过5点Gauss-Hermite积分拟合粒子与固壁碰撞后,反弹速度和角度的概率密度分布试验数据,建立粒子与固体碰撞/概率反弹模型.将该模型应用于直升机用整体式预旋与非预旋进气粒子分离器气固两相流场数值模拟,并与另外两种常用的粒子与固壁碰撞反弹模型(平均恢复系数模型、完全弹性碰撞模型)的计算结果进行了对比.结果表明:上述3种碰撞模型都能较好地预测AC粗砂的分离效率；对于C级砂,基于完全弹性碰撞模型的预测结果则过低；基于平均恢复系数模型的预测结果明显偏高,有预旋时尤其明显；而基于概率反弹模型的预测结果处于两者之间,与试验结果吻合更好. 

Numerical simulation of two phase flow in inlet particle separator based on probabilistic bounce model

A probabilistic approach for the integral inlet separator particle trajectory simulations by fitting probability functions with five points Gauss-Hermite methods was presented, and its impact on particle tracking accuracy was performed as compared with deterministic particle rebound model and elastic bounce model. Results show that,the above three bounce models perform well in the prediction of separation efficiency for AC coarse sand; for C spec sand, results based on elastic bounce model deviates from reality; the deterministic particle rebound model overpredicts the separation efficiency of C spec sand, especially for the swirling inlet particle separator, and the probabilistic bounce model achieves an intermediate value in good agreement with experimental data.