Cavitation shedding dynamics around a hydrofoil simulated using a filter-based density corrected model

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• 作者：An Yu ; Bin Ji ; RenFang Huang ; Yao Zhang…
• 关键词：cavitation ; Filter ; Based Density Corrected Model (FBDCM) ; cavitating flow ; cavity shedding ; vortex structure
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：58
• 期：5
• 页码：864-869
• 全文大小：1,377 KB
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• 作者单位：An Yu (1)
  Bin Ji (2)
  RenFang Huang (1)
  Yao Zhang (3)
  YuNing Zhang (4)
  XianWu Luo (1)
  
  1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China
  2. School of Power and Mechanical Engineering, Wuhan University, Wuhan, 430072, China
  3. China Ship Development and Design Center, Wuhan, 430064, China
  4. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing, 102206, China
  
• 刊物类别：Engineering
• 刊物主题：Chinese Library of Science
  Engineering, general
  
• 出版者：Science China Press, co-published with Springer
• ISSN：1869-1900

文摘

The unsteady turbulent cloud cavitation around a NACA66 hydrofoil was simulated using the filter-based density corrected model (FBDCM). The cloud cavitation was treated as a homogeneous liquid-vapor mixture and the effects of turbulent eddy viscosity were reduced in cavitation regions near the hydrofoil and in the wake. The numerical results (in terms of the vapor shedding structure and transient pressure pulsation due to cavitation evolution) agree well with the available experimental data, showing the validity of the FBDCM method. Furthermore, the interaction of vortex and cavitation was analyzed based on the vorticity transport equation, revealing that the cavitation evolution has a strong connection with vortex dynamics. A detailed analysis shows that the cavitation could promote the vortex production and flow unsteadiness by the dilatation and baroclinic torque terms in the vorticity transport equation.