多角度弯曲管磨粒流加工数值模拟研究

Numerical Simulation of Abrasive Flow Machining in Multi-angle Elbows

采用磨粒流加工工艺对多角度弯曲管内表面抛光过程进行数值模拟研究。利用FLUENT软件研究了不同弯曲角度下入口流速、磨料浓度对磨粒流抛光工艺过程的影响,得到了入口流速、磨料浓度对弯管局部压差、进出口压差、湍流强度等参数的影响规律。对压力和速度的整体作用效果进行了分析,得出了磨粒流抛光细长管类零件内表面的适宜工况。在此基础上,进行了磨粒流抛光过程热量积聚的非稳态模拟,模拟结果表明加工过程中温度变化较小。研究结果为实际磨粒流加工提供了参考。

Abrasive particle flow processing technology was applied to complete the numerical simulation of inner surface polishing processes of multi-angle elbows.Effects of inlet flow velocity and abrasive concentration on abrasive particle flow polishing processes were studied by FLUENT software under different bending angles.Effect laws of inlet flow velocity and abrasive concentration on local pressure differences of bent pipe,inlet and outlet pressure differences,and turbulence intensity were obtained.The overall effects of the pressure and velocity were analyzed.Then the suitable working conditions of the inner surfaces of abrasive particle flow polishing pipes were obtained.Based on this,an unsteady numerical simulation of heat accumulation was carried out during abrasive flow polishing processes.Simulation results show that the temperature changes are small during the processes.These results provide a reference for actual abrasive flow processes.