Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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An Analysis of Flashing Jet Behavior of Pressurized Water

물제트의 노즐 입구온도변화에 따른 증발특성 해석

  • KIM, BOOSANG (School of Mechanical Engineering, Pusan National University) ;
  • KIM, HAKDEOK (School of Mechanical Engineering, Pusan National University) ;
  • LIM, HEECHANG (School of Mechanical Engineering, Pusan National University) ;
  • SONG, JUHUN (School of Mechanical Engineering, Pusan National University)
  • Received : 2019.10.01
  • Accepted : 2019.12.30
  • Published : 2019.12.30
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Abstract

In this study, a flashing boiling phenomenon of pressurized water jet was numerically studied and validated against an experimental data in the literatures. The volume of fluid (VOF) technique was used to consider two-phase behavior of water, while the homogeneous relaxation model (HRM) model was used to provide the velocity of phase change. During the flashing boiling through a nozzle, a mach disk was observed near nozzle exit because of pressure drop resulting from two-phase under-expansion. The flashing jet structure, local distributions of temperature/vapor volume fraction/velocity, and position of the mach disk were examined as nozzle inlet temperature changed.

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References

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