磨削液射流两相流流场特性的应用研究  

Application Study on Two-phase Flow Field Properties of Grinding Fluidic Jet

作　　者：郑钧宜[1] 李楠[1] 江征风[1] 

机构地区：[1]武汉理工大学机电学院,湖北武汉430070

出　　处：《机床与液压》2009年第1期20-22,8,共4页Machine Tool & Hydraulics

基　　金：湖北省数字制造重点实验室开放基金的资助项目(SZ0613)

摘　　要：应用两相流理论对磨削液射流冷却过程进行研究,将VOF方法引入磨削液流场的模拟仿真过程中,建立了磨削冷却射流的瞬态模型。利用有限体积法对两相流流场进行数值仿真,求出了在不同位置以不同速度向磨削引入区射流时,气液两相流流场的压力、速度及磨削液的体积分布特性。仿真结果与实验结果符合得很好。计算结果表明:两相流理论模型比单相流模型能更真实地模拟磨削冷却过程。通过分析仿真结果,提出了一种判断磨削过程中冷却液冷却效果好坏的方法。通过仿真给出了磨削液供给充足时出口边界的确切位置,并得出了磨削液是沿着砂轮边缘而不是沿着工件表面离开磨削区的结论。Unsteady model of grinding cooling jet was constructed based upon two-phase flow theory, which was applied to study the cooling process of grinding-fluidic jet, accompanied with VOF method introduced. Two-phase flow field was simulated by way of finite volume method, and the mixture pressure distribution, mixture velocity distribution and grinding-cooling fluid distribution of air and fluid two-phase flow field at different jet velocities in different positions were calculated. Simulation results, to a certain degree, agree with experimental results. The simulation results indicate that two-phase flow theory is more appropriate to the occasion of analyzing grinding cooling process than one-phase flow theory in that it represents the status in practice. A new method to judge the cooling effect of fluidic jet in the course of grinding was proposed based on the simulation results, and the exact position on the outlet side was given by simulation. An important conclusion that within the grinding zone, the grinding fluid departs from the grinding zone by. Attaching to the surface of the wheel not to the workpiece was presented.

关 键 词：两相流 磨削冷却 流体射流 VOF方法 

分 类 号：TH161[机械工程—机械制造及自动化]