从理论上分析了磁射流抛光中的磁场与流场的相互作用,构建了磁射流抛光的冲击射流模型,基于磁流体动力学对磁射流抛光过程的紊动冲击射流进行数值模拟,得到了磁射流抛光过程的连续流场和射流在工件壁面上的压力、速度、紊动强度分布。通过比较射流抛光和磁射流抛光的数值计算结果,分析了磁流变效应对射流稳定性的影响,从射流的流场、速度、紊动强度等方面分析射流在磁场中稳定的原因。 The interaction between the magnetic field and the flow field in the magnetic fluid jet polishing is theoretically analyzed. The impact jet model of the magnetic jet polishing is constructed. The turbulent impinging jet of the magnetic jet polishing is numerically simulated based on the magnetohydrodynamics. The magnetic Continuous flow field of jet polishing and pressure, velocity and turbulence intensity distribution of jet on the workpiece wall. By comparing the numerical results of jet polishing and magnetic jet polishing, the influence of magnetorheological effect on the jet stability is analyzed. The reason of jet stability in magnetic field is analyzed from the jet flow field, velocity and turbulence intensity.