计时鸣, 钟佳奇.稀疏软性磨粒流的磨粒群分布及其动力学特性研究[J].轻工机械,2012,30(4): |
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 |
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DOI: |
中文关键词: 软性磨粒流 粒子成像测速(PIV) 结构化表面 数值模拟 精密加工 |
英文关键词:soft abrasive flow particle image velocimetry (PIV) structural surface numerical simulation precision machining |
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中文摘要: |
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。 |
英文摘要: |
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 κ-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. |
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