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推导了可用于研究液固撞击问题的非线性波动模型 ,并将其应用于水锤过程及球形液滴与刚性固体平面法向撞击过程的数值分析 .通过对水锤过程的模拟分析 ,给出了液固接触面压力随时间的分布 ;对球形液滴与刚性固体平面撞击过程的模拟 ,给出了不同时间液固接触面上无量纲压力分布 ,以及液滴内无量纲压力的等值线 .结果表明 ,非线性波动模型可以给出详细的液固撞击过程的各物理参量 ,为液滴侵蚀固体表面问题的研究提供了可靠的依据 .结果与精确解吻合良好 ,从而对非线性波动模型进行了验证 .
The nonlinear wave model that can be used to study the liquid-solid impact problem is deduced and applied to the numerical analysis of water hammer process and the normal impact process between spherical droplets and rigid solid. By simulating the water hammer process, The distribution of the pressure at the liquid-solid interface with time is simulated. The simulation of the collision between the spherical droplets and the rigid solid plane shows the non-dimensional pressure distribution at the liquid-solid interface and the contours of the non-dimensional pressure inside the droplet The results show that the nonlinear fluctuation model can give detailed physical parameters of the liquid-solid impact process and provide a reliable basis for the study of the droplet erosion on the solid surface.The results are in good agreement with the exact solution, so that the nonlinear fluctuation model Verified.