In order to study the effectiveness of polishing a special-shaped surface with abrasive flow,the standard k-ε model and SIMPLEC algorithm are used,the polishing of rifled tube with polygonal spiral surface by the solid-liquid two-phase abrasive flow at different inlet pressures is numerically simulated to obtain the variations of dynamic pressure,turbulent kinetic energy and turbulent intensity at the near wall surface of polygonal spiral surface with the inlet pressure,and the effect of inlet pressure on the polishing quality of surface is explored.The solid-liquid two-phase flow polishing test is made to verify the accuracy of numerical analysis,and the morphologies of inner surface of rifled tube before and after the processing are detected.The results show that the surface roughness can be effectively improved by the solid-liquid two-phase abrasive flow,the texture of inner surface becomes smoother,its surface topography is ideal,and the surface roughness decreases from 1.450 μm to 0.296 μm after polishing;with the increase in inlet pressure,the surface textures of irregular surface parts after abrasive flow polishing are more compact,and the surface quality is improved obviously.%为探索固体与液体(简称固液)两相磨粒流抛光异形曲面的有效性,采用标准k-ε模型和压力耦合SIMPLEC算法,通过对不同入口压力条件下固液两相磨粒流抛光多边形螺旋曲面膛线管进行数值模拟研究,获得多边形螺旋曲面流道近壁面处的动压、湍流动能、湍流强度随入口压力变化特性,分析入口压力对固液两相磨粒流抛光异形曲面的质量控制规律.为验证数值分析的准确性,进行了必要的固液两相流抛光实验,以异形曲面零件-膛线管为研究对象,对磨粒流抛光前后膛线管内表面的表面形貌和表面粗糙度进行了检测分析.研究结果表明:固液两相磨粒流抛光异形曲面可有效提高异形曲面的表面质量,经磨粒流抛光后的膛线管内表面纹理变得更加平滑,可获得理想的表面形貌,表面粗糙度由抛光前的1.450 μm降低至抛光后的0.296 μm;随着入口压力的增加,磨粒流抛光后的异形曲面零件表面纹理更加致密,表面质量得到明显改善.
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