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

The Society of Naval Architects of Korea (대한조선학회)
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A Study on Natural Supercavitation and Drag Characteristics of Axisymmetric Cavitators

축대칭 캐비테이터에서 발생하는 자연 초월공동과 항력 특성에 대한 연구

  • Kim, Ji-Hye (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Jeong, So-Won (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Ahn, Byoung-Kwon (Department of Naval Architecture & Ocean Engineering, Chungnam National University) ;
  • Jeon, Yun-Ho (Mechanical Engineering R&D Lab, LIG Nex1 Co., LTd.)
  • 김지혜 (충남대학교 선박해양공학과) ;
  • 정소원 (충남대학교 선박해양공학과) ;
  • 안병권 (충남대학교 선박해양공학과) ;
  • 전윤호 (LIG 넥스원(주) 기계연구센터)
  • Received : 2016.06.14
  • Accepted : 2016.10.18
  • Published : 2016.12.20
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Abstract

A study was carried out to investigate typical features of natural supercavitation generated behind axisymmetric bodies such as disk and cone shaped cavitators. Main focuses of the study were to observe formation process of the supercavity and to measure drag forces acting on cavitators. Experiments were carried out at the cavitation tunnel of the Chungnam National University (CNU-CT), which has a capability to make sufficient flow speed for supercavitation experiments and to remove broken cavity bubbles coming back to the test section. Blockage effects on supercavity dimensions were evaluated and an effort was made to correlate tunnel experiments with unbounded flow. On the basis of experimental and numerical results, geometrical features of supercavities and characteristics of drag forces were examined and their relations were proposed.

Keywords

References

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  1. Numerical Analysis of Unsteady Cavitating Vortex around Two-dimensional Wedge-shaped Submerged Body vol.32, pp.1, 2018, https://doi.org/10.26748/KSOE.2018.2.32.1.036