Computational modeling of cavitating flows in liquid nitrogen by an extended transport-based cavitation model

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• 作者：TieZhi Sun ; XiangFu Ma ; YingJie Wei ; Cong Wang
• 关键词：extended transport ; based cavitation model ; liquid nitrogen ; thermodynamic effects ; cavitating flows
• 刊名：SCIENCE CHINA Technological Sciences
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：59
• 期：2
• 页码：337-346
• 全文大小：1,224 KB
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• 作者单位：TieZhi Sun (1)
  XiangFu Ma (2)
  YingJie Wei (1)
  Cong Wang (1)
  
  1. School of Astronautics, Harbin Institute of Technology, Harbin, 150001, China
  2. Beijing Institute of Machinery Equipment, Beijing, 100854, 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

Developing a robust computational strategy to address the rich physical characteristic involved in the thermodynamic effects on the cryogenic cavitation remains a challenge in research. The objective of the present study is to focus on developing modelling strategy to simulate cavitating flows in liquid nitrogen. For this purpose, numerical simulation over a 2D quarter caliber hydrofoil is investigated by calibrating cavitation model parameters and implementing the thermodynamic effects to the Zwart cavitation model. Experimental measurements of pressure and temperature are utilized to validate the extensional Zwart cavitation model. The results show that the cavitation dynamics characteristic under the cryogenic environment are different from that under the isothermal conditions: the cryogenic case yields a substantially shorter cavity around the hydrofoil, and the predicted pressure and temperature inside the cavity are steeper under the cryogenic conditions. Compared with the experimental data, the computational predictions with the modified evaporation and condensation parameters display better results than the default parameters from the room temperature liquids. Based on a wide range of computations and comparisons, the extensional Zwart cavitation model may predict more accurately the quasi-steady cavitation over a hydrofoil in liquid nitrogen by primarily altering the evaporation rate near the leading edge and the condensation rate in the cavity closure region. Keywords extended transport-based cavitation model liquid nitrogen thermodynamic effects cavitating flows