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采用光滑粒子流体动力学方法(SPH)模拟液体射流与刚性表面的碰撞,建立了半径为0.24cm,高为0.75cm的圆柱形铝液滴以100m/s的速度与刚性表面发生碰撞的SPH计算模型.在计算中借助Voronoi多边形分配粒子的初始质量,并考虑了大变形过程中随着粒子相互间距离的变化而采用可变光滑半径.根据计算结果分析了碰撞过程中圆柱形液滴沿轴向的压力波形演化特征,并给出了不同时刻金属液体射流的变形情况.通过粒子速度随时间的变化曲线,观察到液体在碰撞后首先进入一个稳定流动的过程,此稳定流动的过程相对较短,随后流动开始发生混乱.
The collision between the liquid jet and the rigid surface was simulated by a smooth particle hydrodynamic method (SPH), and the SPH was calculated for a cylindrical aluminum droplet with a radius of 0.24 cm and a height of 0.75 cm colliding with a rigid surface at a velocity of 100 m / s Model. In the calculation, Voronoi polygons are used to assign the initial mass of the particles and the variable smooth radius is taken into account in the process of large deformation as the distance between the particles changes.According to the calculation results, The evolution of the pressure waveform is given and the deformation of the metal liquid jet at different moments is given. Through the curve of particle velocity with time, it is observed that the liquid first enters into a stable flow after the collision, and the steady flow is relatively Short, then flow began to chaos.