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首页> 外文期刊>Ocean Engineering >Numerical investigation of attached cavitation shedding dynamics around the Clark-Y hydrofoil with the FBDCM and an integral method
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Numerical investigation of attached cavitation shedding dynamics around the Clark-Y hydrofoil with the FBDCM and an integral method

机译：用FBDCM和积分法数值研究Clark-Y水翼周围附着的空化动力学。

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摘要

Unsteady cavitating turbulent flow around a three-dimension Clark-Y hydrofoil is investigated using the integral method and numerical simulations with the filter-based density correction model turbulence model (Huang et al., 2014). The numerical results are validated with experimental data. The interaction between the cavitation and the fluid vortex is analyzed with the vorticity transport equation. The results demonstrate that the vortex stretching is mainly in the center of the cloud cavity and changes quasi-periodically as the cloud cavity evolves. The correlation between the entrainment ability of upstream flow and cavitation is built in a three dimensional case. The numerical results and the theoretical analysis show that the evolution of total vapor volume determines the overall entrainment ability and the behavior of re-entrant jet significantly impacts the variations of entrainment ability. The correlation between the flow field and the entrainment ability provides a new perspective for the study in cavitation, especially the re-entrant jet dynamics around hydrofoil. The relationship between the cavity volume pulsations and the pressure fluctuations around the hydrofoil is analyzed with a simplified one dimensional model. The model demonstrates that the second derivative of the total vapor volume is mainly responsible for the cavitation excited pressure fluctuations.
机译：使用积分方法和基于滤波器的密度校正模型湍流模型的数值模拟，研究了三维Clark-Y水翼周围的非稳态空化湍流（Huang等，2014）。数值结果得到了实验数据的验证。利用涡度输运方程分析了空化与流体涡旋之间的相互作用。结果表明，涡旋拉伸主要在云腔的中心，并且随着云腔的演化而近似周期性地变化。在三维情况下建立了上游流的夹带能力与空化之间的相关性。数值结果和理论分析表明，总蒸气体积的演化决定了总的夹带能力，而折返射流的行为显着影响了夹带能力的变化。流场与夹带能力之间的相关性为气蚀研究提供了新的视角，特别是围绕水翼的折返射流动力学。利用简化的一维模型分析了腔体脉动与翼型周围压力波动之间的关系。该模型表明，总蒸气量的二阶导数主要是引起空化激发压力波动的原因。

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  • 来源
    《Ocean Engineering》 |2017年第1期|247-261|共15页
  • 作者

    Long Xinping; Cheng Huaiyu; Ji Bin; Arndt Roger E. A.;

  • 作者单位

    Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan 430072, Peoples R China|Sci & Technol Water Jet Prop Lab, Shanghai 200011, Peoples R China;

    Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan 430072, Peoples R China;

    Wuhan Univ, State Key Lab Water Resources & Hydropower Engn S, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China|Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan 430072, Peoples R China|Sci & Technol Water Jet Prop Lab, Shanghai 200011, Peoples R China;

    Univ Minnesota, St Anthony Falls Lab, Minneapolis, MN 55414 USA;

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

    Cavitation; Clark-Y hydrofoil; Filter-based density correction model (FBDCM); Entrainment ability; Pressure fluctuations;

    机译：空化;Clark-Y型翼型;基于过滤器的密度校正模型（FBDCM）;夹带能力;压力波动;

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