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针对现有流体加工方法中加工效率低、易出现工件表面各区域加工纹理不均匀的问题,提出一种气-液-固三相磨粒流抛光加工新方法.基于Realizable k-ε湍流模型和Mixture模型,建立气-液-固三相磨粒流抛光加工数值模拟模型.数值模拟结果揭示了气-液-固三相磨粒流形成的高速湍流涡旋流场动力学特性,同时也发现了磨粒流流场中磨粒和微气泡的运动及分布规律,得到较优适用于气-液-固三相磨粒流抛光加工磨粒流入射角度设计参数,并设计出实验抛光工具.经过1h的实验加工后,与无微气泡条件的液固两相流抛光加工对比,气-液-固三相磨粒流抛光加工的工件表面相同区域的粗糙度值更低,纹理也更为均匀.上述研究结果表明:气-液-固三相磨粒流的流场特性提高了磨粒和微气泡运动的无序性及微气泡溃灭的概率,且磨粒流中的微气泡溃灭所释放的能量提高了磨粒的抛光加工效率.“,”According to the problem of low efficiency and uneven texture of workpiece surface processing for the existing fluid machining method,a new method of gas-liquid-solid three phase abrasive flow machining was proposed.Based on Realizable turbulence modle and the Mixture model,the numerical simulation model of gas-liquid-solid three phase abrasive flow polishing process was established.The numerical simulation results reveal the dynamics characteristics of the high-speed turbulent vortex flow field formed by the gas-liquid-solid three phase abrasive flow.Besides,the movement and distribution of abrasive and micro bubbles in the abrasive flow field is found.From the numerical simulation results,the design parameters of the abrasive flow incident angle which is better for gas liquid solid three phase abrasive flow polishing process is used to design the experimental polishing tool.After 1 hour of processing experiment,comparing with liquid-solid two phase abrasive flow machining,the roughness is low and the processing texture of the workpiece surface is more uniform in the same area of the workpiece surface.The above research results show that the flow field characteristics of gas-liquid-solid three phase abrasive flow improve the disorder of abrasive and micro bubbles motion and the probability of micro bubble collapse.The energy released by the collapse of microscopic bubbles can improve the effect of abrasive polishing.