Cavitation erosion will lead to pits with different curvatures on the wall of fluid machinery,which will affect the flow field around the wall of fluid machinery and make the collapse process of the nearby vacuole complex.The process of vacuole collapse near a pit wall was simulated based on the Euler-Euler method,and the dynamic characteristics of the spherical vacuole under different wall curvatures were analyzed.Results show that the vacuole collapse time increases exponentially with the relative pit curvature and decreases monotonically with the near-wall coefficient of the vacuole in a linear function,while the Mach number of the vacuole jet decreases monotonically with the relative pit curvature and increases monotonically with the near-wall coefficient of the vacuole in a linear function.The impact load decreases monotonically with the vacuole collapse time in a quadratic function,and decreases monotonically with the relative pit curvature and the near-wall coefficient of the vacuole in a linear function.
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