Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Numerical Analysis of Supercavitation according to Shape Change of the Two-dimensional Submerged Body

2차원 몰수체의 형상 변화에 따른 초월공동 수치해석

  • Park, Hyun-Ji (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Kim, Ji-Hye (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Ahn, Byoung-Kwon (Department of Naval Architecture & Ocean Engineering, Chungnam National University)
  • 박현지 (충남대학교 선박해양공학과) ;
  • 김지혜 (충남대학교 선박해양공학과) ;
  • 안병권 (충남대학교 선박해양공학과)
  • Received : 2017.09.12
  • Accepted : 2017.11.22
  • Published : 2018.02.20
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Abstract

A cavitator plays an important role to generate the supercavity. Most previous numerical and experimental studies have been focused on the presence of cavitators alone. However, the body behind the cavitator causes a change in the wake flow and hence it affects generation and growth of the supercavity. In this paper, we present a boundary elementary method based on a potential flow analysis, and calculate characteristics of the supercavity formation depending on the change of the body shape of two-dimensional submerged objects. Various parameters such as cone angle of the cavitator, length of the forehead and diameter of the body are considered. The results show that the longer the forepart length, the longer the cavity is created under the same conditions, and also the change in the diameter of the body is the most influential factor on the growth of the supercavity. As a result, we suggest that it is necessary to carefully consider the influence of the body shape during the initial design stage of the supercavitating underwater vehicle.

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References

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