稀疏软性磨粒流的磨粒群分布及其动力学特性研究

Research on Distribution and Dynamic Characteristic of Particle Group in Low Concentration Soft Abrasive Flow

利用CFD技术和PIV测量研究了结构化表面约束流道内的流场和磨粒群分布。基于液-固两相流体耦合理论,利用欧拉-拉格朗日模型中的DPM模型和标准κ-ε湍流模型对V型纹理矩形截面流道内颗粒运动进行了数值模拟,计算了流场中的湍流性能等参数。结果表明:V型纹理矩形截面约束流道内磨粒群的分布总体均匀,各速度矢量紊乱无序,靠近底部壁面区域颗粒相对比较密集,这些都有利于磨粒对壁面的微力微量切削。

The CFD technique and PIV were adopted to investigate the flow field and distribution of particle group. Based on the coupled theory of liquid-solid two phases flow, DPM model which belongs to Euler-Lagrange model and standard k-ε turbulence model were used to analyze particle motion, and some parameters were calculated in the flow passage with V-shaped texture and rectangular section. Results show that distribution of particle group in the flow passage with V-shaped texture and rectangular section is well-distributed overall, but each velocity vector is in disorder and the particle density near wall at the bottom is bigger, these are conducive to the wall of wear. [ Ch,ll fig. 10 ref. ]