飞行加速度对发动机内粒子轨迹影响研究

利用Euler-Lagrange模型方程，对发动机内的三维两相流动进行了数值模拟，分析了不同过载组合、不同粒子直径、不同壁面恢复系数对发动机燃烧室内粒子的聚集部位、浓度分布、冲刷速度、冲刷角度等的影响。计算结果表明：在纵向和横向过载相等的情形下，粒子的最大聚集密度随过载量的增加，呈先减小后增加的趋势，最大聚集点随过载量的增加向流动方向移动，过载量的大小对粒子的冲刷角度、冲刷速度影响较大；在相同工况下，随粒子直径的增加，最大聚集部位向流动方向移动，最大聚集密度增加；随粒子壁面恢复系数恢复得减小，最大聚集部位向发动机头部移动，最大聚集密度增加。

Influence of Flight Acceleration on Particle Trajectories in Solid Rocket Moter

Using the Euler-Lagrange model, numerical simulations are carried out. Influences of different axial and transverse accelerations, drop diameter and restitution coefficient on particle concentration position, particle concentration density, particle erode angle and velocity are analysized. Results show that when the axial and transverse accelerations are equal, the maximum particle concentration density is firstly decreasing and then increasing along with the acceleration and the maximum particle concentration position moves backwards at the same time. The acceleration also has an effect on particle erode angle and velocity. With increasing drop diameter, the maximum particle concentration density is increasing, the maximum particle concentration position moves backwards. With decreasing restitution coefficient, the maximum particlle concentration density is increasing and the maximum particle concentration position moves forward.