基于气液两相流模型的电解加工多场耦合仿真

针对电解加工产生的气泡影响加工精度的问题，引入Euler Euler双流体模型对电解加工中气液两相流场进行描述，并耦合电场和温度场相关模型，分析了工具阴极、工件阳极表面气泡率、温度、电导率和电流密度的分布规律；通过调整加工电压、入口压力和出口压力，对工件阳极表面气泡率和电流密度分布进行仿真优化。仿真结果表明：在流速相同的条件下，减小加工电压、增加出口压力能够改善电导率分布，使阳极表面电流密度分布更加均匀。实验结果表明：仿真得到的阳极表面电流密度分布与工件轮廓高度误差分布吻合；采用优化后参数加工出的工件轮廓精度得到提高。

Multi physics Coupling Simulation of ECM Based on Gas Liquid Two phase Flow Model

Considering the effects of bubbles on processing precisions, a gas liquid two phase flow field in ECM processes was described according to the Euler Euler two fluid model. Coupling with the electric field and the temperature field, the distributional regularities of the cathode and anode surface bubble rate, temperature, electrical conductivity and current density were analyzed. The simulation optimizations of the anode surface bubble rate and current density were researched by adjusting voltages, inlet pressures and outlet pressures. The simulation results show that reducing machining voltages and increasing the outlet pressures may improve the electrical conductivity distributions and make the current density distribution on the anode surfaces more uniform, under the same flow rate. The experimental results show that the distributions of the current density on the anode surfaces are consistent with the height error distributions of the workpieces. The precisions of the workpieces are improved by optimizing the parameters.