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Study on Dynamic Characteristics of Two-phase Abrasive Flow Based on Shear Stress Transport Turbulent Model

In order to bypass difficulties in experiment of soft abrasive flow dynamic characteristics,a method based on shear stress transport(SST) turbulent model was proposed.It has both advantages of k-ω and standard k-e models and higher simulation precision in the near wall region.As a common structure in engineering,a U-shaped channel was taken as a research object,and the soft abrasive flow dynamic characteristics were analyzed by using the method of combining SST turbulent model and mixture model.The pressure and velocity distributions of the abrasive flow in channel were obtained by analyzing the numerical simulation results.A test-bed was designed to observe the track of particles in the channel.It is found that,although the velocity of fluid on the wall surface is zero,the particles in fluid still impact the wall.The theoretical and experimental researches reveal the dynamic characteristics of abrasive flow in channel and provide a foundation for the abrasive flow machining and the design of restrictive components.