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

The Society of Naval Architects of Korea (대한조선학회)
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Measurement of Honeycomb Turbulence in a Cavitation Tunnel Using Particle Image Velocimetry Method

PIV 기법을 이용한 캐비테이션 터널에서의 Honeycomb 난류 계측

  • Ryu, Min-Cheol (Ship & Ocean R&D Institute, Daewoo Shipbuilding & Marine Engineering Co. Ltd) ;
  • Oh, Jung-Geun (Dept. of Naval Architecture & Ocean Engineering, Seoul National University) ;
  • Kim, Yoo-Chul (Dept. of Naval Architecture & Ocean Engineering, Seoul National University) ;
  • Koh, Won-Gyu (Dept. of Naval Architecture & Ocean Engineering, Seoul National University) ;
  • Lee, Youn-Mo (Dept. of Naval Architecture & Ocean Engineering, Seoul National University) ;
  • Suh, Jung-Chun (Dept. of Naval Architecture & Ocean Engineering, Seoul National University)
  • 류민철 (대우조선해양㈜ 선박해양기술연구소) ;
  • 오정근 (서울대학교 조선해양공학과) ;
  • 김유철 (서울대학교 조선해양공학과) ;
  • 고원규 (서울대학교 조선해양공학과) ;
  • 이윤모 (서울대학교 조선해양공학과) ;
  • 서정천 (서울대학교 조선해양공학과)
  • Published : 2008.02.29
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Abstract

The two dimensional PIV (particle image velocimetry) measurement technique is applied to water flow in a narrow cavitation tunnel. The nearly homogeneous and isotropic turbulent flows are generated by the honeycomb installed in the tunnel and visualized with a PIV technique. The velocities in the measurement plane at the tunnel centerline 184cm downward from the honeycomb were measured and calculated by an image correlation technique. The turbulent properties are evaluated and each term in the turbulent kinetic energy equation is calculated for the conditions with different internal pressures. Lowering the internal pressure gives an effect on the turbulent flow due to growing bubbles which are resolved in the water. The turbulent kinetic energy in the measurement plane is decayed much slower than those of other research results carried out with wind tunnels. With decreasing the tunnel internal pressures the turbulent intensities are increased about 1.5 times and the anisotropic tendency is also increased.

Keywords

References

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