结构化流道近壁区软性磨粒流流动仿真及实验研究  

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

作　　者：计时鸣[1] 唐波[1] 谭大鹏[1] 李军[1] 翁晓星[1] 晓风清[1] 

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室,杭州310014

出　　处：《振动与冲击》2012年第6期10-14,18,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金(50875242;50905163);浙江省自然科学基金(Z107517;1090836)

摘　　要：为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 k-ε湍流模型,通过对结构化流道的结构进行合理的网格划分及特殊边界条件设置,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,为此在实际加工中用引流模块。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。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.

关 键 词：结构化流道 软性磨粒流 去除率 数值模拟 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]