【摘要】 理论分析了射流抛光的紊动冲击射流特点,构建了射流抛光的垂直冲击射流模型和斜冲击射流模型。根据射流抛光冲击射流的特点,比较各种流体模型后,采用RNGk-ε模型应用于射流抛光模型的计算。利用计算流体力学理论的二阶迎风格式对抛光模型方程离散,用SIMPLEC数值计算方法对射流抛光过程的紊动冲击射流和离散相磨粒分布进行数值模拟,得到了射流抛光过程的连续流场和离散相磨粒与水溶液的耦合流场,同时计算出了抛光液射流在工件壁面上的压力、速度、紊动强度、剪切力分布和磨粒体积质量分布,分析了垂直射流抛光模型和斜冲击射流抛光模型紊流流场的特点。更多还原

【Abstract】 By analyzing the turbulent impinging jets of fluid jet polishing,the article established two physical models for the fluid jet polishing: vertical and oblique impinging jets models.Researched the characteristics of fluid jet polishing,found that the RNG k-ε model is more suited for the polishing model compared with kinds of fluid models,because it can calculate the model with badly crooked streamlines accurately.Discrete model with finite volume method was gotten and the equations of fluid model with the second order upwind scheme were discretized.Then,the vertical and the oblique impinging jets models were simulated using SIMPLEC algorithm,and the continuous fluid field and the discrete phase grain field of fluid jet polishing model were derived,and the distributions of pressure,velocity,turbulent intensity and concentration on the wall of workpiece were gotten.Finally,we analyzed the characteristics of the vertical and oblique impinging jets polishing models.更多还原