结构化流道近壁区软性磨粒流流动仿真及实验研究

为了揭示结构化流道近壁区软性磨粒流的压力场及速度场的分布规律，有效预测其软性磨粒流的材料去除特性，采用VOF多相流模型和RNG 湍流模型，通过对结构化流道的结构进行合理的网格划分和特殊边界条件设置，对结构化流道内部的软性磨粒流流动进行数值模拟。仿真结果表明：不同的软性磨粒流入口位置对工件加工会产生影响；结构化流道中软性磨粒流的压力场、速度场和软性磨粒流的去除率随着加工区域位置的不同而不同；加工区域入口区域的压力、速度值存在突变，为此在实际加工用引入了引流模块。流场数值模拟和实验研究结果趋势是一致的，数值模拟为深入研究软性磨粒流的基本规律提供一种理论工具

Simulation and test for softness abrasive flow in near-wall region of structural flow

The softness abrasive flow in structural flow was simulated using VOF(volume of fluid) model and RNG(renormalization group) κ-ε turbulence model,through the proper partition of meshs generated for structural flow and the special setting of boundary conditions,in order to investigate the distribution regularity of pressure field and velocity field and predict the material removal characteristics efficiently in near-wall surface of workpiece.The simulation results showed that different entrance locations of softness abrasive flow have an effect on workpiece machining;the pressure field,the velocity field and the material removal rate of the softness abrasive flow change with machining positions in machining range;a module of guide flow is induced as pressure value and velocity value change sharply in entrance region.The simulation results agreed well with the test ones,the numerical simulation provide a theoretical basis for further study on basic rules of softness abrasive flow.