한국해양공학회지 (Journal of Ocean Engineering and Technology)

  • 제32권1호
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  • Pages.36-42
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  • 2018
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  • 1225-0767(pISSN)
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  • 2287-6715(eISSN)
한국해양공학회 (Korean Society of Ocean Engineers)
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2차원 쐐기형 몰수체의 비정상 공동 와류에 대한 수치해석

Numerical Analysis of Unsteady Cavitating Vortex around Two-dimensional Wedge-shaped Submerged Body

  • 김지혜 (충남대학교 선박해양공학과) ;
  • 정소원 (충남대학교 선박해양공학과) ;
  • 안병권 (충남대학교 선박해양공학과) ;
  • 박철수 (한국해양연구원 선박해양플랜트연구소) ;
  • 김건도 (한국해양연구원 선박해양플랜트연구소)
  • Kim, Ji-Hye (Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Jeong, So-Won (Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Ahn, Byoung-Kwon (Naval Architecture and Ocean Engineering, Chungnam National University) ;
  • Park, Chul-Soo (Korea Research Institute of Ships and Ocean Engineering) ;
  • Kim, Gun-Do (Korea Research Institute of Ships and Ocean Engineering)
  • 투고 : 2017.12.19
  • 심사 : 2018.02.01
  • 발행 : 2018.02.28
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초록

Unlike a slender body, vortices are shed off alternately in the wake of a blunt body. In the case of liquid flows, when the pressure falls below the vapor pressure, cavitation occurs in the vortex core and affects the formation of the vortex street. This phenomenon is of major importance in many practical cases because the alternate shedding of vortices creates imbalanced forces on the body. Hence, it is very important to determine the shedding frequency of cavitating vortices. In this paper, the unsteady cavitating flow around a two-dimensional wedge-shaped submerged body was simulated using the commercial code STAR-CCM+. A numerical investigation of the structure of cavitating vortices was performed for a model with an apex angle of $20^{\circ}C$. The results were validated by comparing them with experimental measurements carried out at a cavitation tunnel of Chungnam National University (CNU-CT). It was found that the shedding frequency of the vortex increased by up to 18%, which was strongly affected by the development of cavitation.

키워드

참고문헌

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