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Dynamics of unsteady cavitating flow in compressible two-phase fluid

机译：可压缩两相流体中非定常空化流的动力学

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摘要

A pressure-based compressible-medium numerical method is developed and applied to the computation of cavitating flow. The cavitating flow is regarded as a homogeneous mixture with the density of the mixture being a function of the void volume fraction. The void volume fraction is governed by a transfer equation, in which the finite phase change rate is considered. To include the compressibility effect, the equation of state of each phase is introduced into the numerical modeling. The governing equations are solved using a pressure-velocity coupling approach, where finally an implicit pressure correction equation is obtained and solved. Our calculation demonstrates that the present compressible-medium numerical method is capable of simulating the dynamics of unsteady cavitating flow. In addition, this method is applicable to the study of the wave propagation in the flow fields, such as waves induced by the collapse of the cavitation cloud, or the presence of imposed external pressure waves.
机译：提出了一种基于压力的可压缩介质数值方法，并将其应用于空化流的计算。空化流被认为是均匀的混合物，该混合物的密度是空隙体积分数的函数。空隙体积分数由传递方程控制，其中考虑了有限的相变速率。为了包括可压缩性效应，将每个相的状态方程引入到数值建模中。使用压力-速度耦合方法求解控制方程，最后获得并求解隐式压力校正方程。我们的计算表明，目前的可压缩介质数值方法能够模拟非定常空化流的动力学。此外，该方法还适用于研究流场中的波传播，例如由空化云的塌陷或施加的外部压力波引起的波。

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  • 来源
    《Ocean Engineering》 |2014年第1期|174-184|共11页
  • 作者

    Lingxin Zhang; Boo Cheong Khoo;

  • 作者单位

    Department of Mechanical Engineering, National University of Singapore, 119260 Singapore, Singapore,State Key Laboratory of Fluid Power Transmission and Control, Department of Mechanics, Zhejiang University. 310027 Hangzhou, China;

    Department of Mechanical Engineering, National University of Singapore, 119260 Singapore, Singapore;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cavitation; Compressible method; Unsteady flow;

    机译：空化可压缩的方法;不稳定流量;

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