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首页> 外文期刊>International Journal of Modern Physics: Conference Series >THE NUMERICAL SIMULATION OF UNSTEADY CAVITATION EVOLUTION INDUCED BY PRESSURE WAVE
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THE NUMERICAL SIMULATION OF UNSTEADY CAVITATION EVOLUTION INDUCED BY PRESSURE WAVE

机译：压力波引起的非定常空洞演化的数值模拟

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摘要

The present study is focused on the numerical simulation of pressure wave propagation through the cavitating compressible liquid flow, its interaction with cavitation bubble and the resulting unsteady cavitation evolution. The compressibility effects of liquid water are taken into account and the cavitating flow is governed by one-fluid cavitation model which is based on the compressible Euler equations with the assumption that the cavitation is the homogeneous mixture of liquid and vapour which are locally under both kinetic and thermodynamic equilibrium. Several aspects of the method employed to solve the governing equations are outlined. The unsteady features of cavitating flow due to the external perturbation, such as the cavitation deformation and collapse and consequent pressure increase are resolved numerically and discussed in detail. It is observed that the cavitation bubble collapse is accompanied by the huge pressure surge of order of 100 bar, which is thought to be responsible for the material erosion, noise, vibration and loss of efficiency of operating underwater devices.
机译：本研究的重点是通过空化可压缩液体流传播压力波，其与空化气泡的相互作用以及由此产生的不稳定空化演化的数值模拟。考虑到液态水的可压缩性影响，并且空化流由单流体空化模型控制，该模型基于可压缩的欧拉方程，并假设空化是液体和蒸汽的均质混合物，在两种动力学下均局部存在。和热力学平衡。概述了用于求解控制方程的方法的几个方面。数值解决了由于外部扰动引起的空化流动的不稳定特征，例如空化变形和塌陷以及随之而来的压力增加。可以观察到，空化气泡的破裂伴随着大约100 bar的巨大压力波动，这被认为是造成材料腐蚀，噪音，振动以及水下设备运行效率下降的原因。

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