DOI QR코드

DOI QR Code

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

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

  1. Blackshire, J.L., 1997,'MSTB 2x6-inch Low Speed Tunnel Turbulence Generator Grid/Honeycomb PIV Measurements and Analysis,' NASA Contractor Report 201666
  2. Carlier J., and Stanislas M., 2005, ' Experimental study of eddy structures in a turbulent boundary layer using particle image velocimetry,' J. Fluid Mechanics, Vol. 535, pp.143-188 https://doi.org/10.1017/S0022112005004751
  3. Chung, K.H., Suh, S.B. and Chun, H.H., 2007, ' Experimental Study on the Eddy Making Damping Effect at the Roll Motion of a Rectangular Barge,' Journal of SNAK, Vol. 44, No. 3, pp. 267-278 https://doi.org/10.3744/SNAK.2007.44.3.267
  4. Comte-Beloot, G. & Corrsin, S., 1966,'The use of a contraction to improve the isotropy of rid-generated turbulence,' Journal of Fluid Mechanics, Vol. 25, part 4, pp. 657-682 https://doi.org/10.1017/S0022112066000338
  5. Deen, N. and Westerweel, J., 2002,'Twophase PIV in bubbly flows: status and trends,' Chem. Eng. Technol. Vol. 25, No.1, pp. 97-101 https://doi.org/10.1002/1521-4125(200201)25:1<97::AID-CEAT97>3.0.CO;2-7
  6. Gopalan, S. and Katz, J., 1997,'Flow structure and modeling issues in the closure region of attached cavitation,' Phy. of Fluids, Vol. 12, No. 4, pp. 895-911
  7. Kato, H., Iwashna, T., Mitanaga, M. and Yamaguchi, H., 1999,'Effect of microbubbles on the structure of turbulence in a turbulent boundary layer,' J. of Marine Science and Tech., Vol. 4, pp. 155-162 https://doi.org/10.1007/PL00010624
  8. Kim, J., Yu, K., Park, Y.H. and Van, S.H., 2004, ' Propeller Wake Measurement in Uniform Flow by Means of PIV/PTV,' Proc. of the SNAK Conference(Annual Autumn Meeting), pp. 578- 582
  9. Kim, J., Moin, P. and Moser, R., 1987, ' Turbulence statistics in fully developed channel flow at low Reynolds number,' Journal of Fluid Mechanics, Vol. 177, pp. 133-166 https://doi.org/10.1017/S0022112087000892
  10. Lee, S.J., Kim, K.S. and Suh, J.C., 2004, ' Calculation of Pressure Fields in the Lagrangian Vortex Method,' Journal of SNAK, Vol. 41, No. 1, pp. 23-30
  11. Oh, J.K., Kim, Y.C., Ryu, M.C., Koh, W.K. and Suh, J.C., 2007,'Development of Algorithm for Stereoscopic PIV using Normalized Crosscorrelation,' Journal of SNAK, Vol. 44, No. 6, pp. 79-90 https://doi.org/10.3744/SNAK.2007.44.6.579
  12. Oh, J.K., 2006, Development of Algorithm for Stereoscopic PIV using Normalized Crosscorrelation and its Application, Ph.D. thesis, Seoul National University
  13. Paik, B.K. and Lee, S.J., 2004,'PIV Velocity Field Analysis of Inflow ahead of a Rotating Marine Propeller,' Journal of SNAK, Vol. 41, No. 4, pp. 30-37
  14. Paik, B.K., Lee, J.Y. and Lee, S.J., 2005,'PIV Analysis on Effects of Free Surface and Immersion Depth on Flow around a Rotating Propeller,' Journal of SNAK, Vol. 42, No. 5, pp. 427-434 https://doi.org/10.3744/SNAK.2005.42.5.427
  15. Paik, B.K., Kim, J., Park, Y.H., Kim, K.S. and Kim, K.Y., 2005,'PIV Analysis of Vortical Flow behind a Rotating Propeller in a Cavitation Tunnel,' J. of SNAK, Vol. 42, No. 6, pp. 619-630 https://doi.org/10.3744/SNAK.2005.42.6.619
  16. Paik, B.K., Kim, J., Kim, G.Y. and Kim, K.S., 2007,'Study on the Three Dimensional Flow Characteristics of the Propeller Wake using PIV Techniques,' Journal of SNAK, Vol. 44, No. 3, pp. 219-227 https://doi.org/10.3744/SNAK.2007.44.3.219
  17. Poelma, C., 2004, Experiments in Particleladen Turbulence . simultaneous particle/fluid measurements in grid-generated turbulence using particle image velocimetry, PhD Thesis, Univ. of Delft
  18. Pope, S.B., 2000, Turbulent flows, Cambridge Univ. Press
  19. Raffel M., Willert C. and Kompenhans J., 1998, Particle Image Velocimetry A Practical Guide, (Berlin: Springer)
  20. Ryu, M.C., Oh, J.G., Kim, Y.C. and Suh, J.C., 2007,'Investigation on the Flow near the Entrance of a Flat Plate using PIV Technique,' Proc. of the SNAK Conference(Annual Spring Meeting)
  21. Ryu, M.C., 2007, Measurement of Turbulent Flow around a Flat Plate with a Wedge-type Leading Edge using Particle Image Velocimetry, Ph.D. thesis, Seoul National University
  22. Saarenrinne, P., Piirto, M. and Eloranta, H., 2001,'Experiences of turbulence measurement with PIV,' Meas. Sci. Technol. Vol. 12, pp. 1904-1910 https://doi.org/10.1088/0957-0233/12/11/320
  23. Scarano F., 2002,'Iterative image deformation methods in PIV,' Meas. Sci. Technol. Vol. 13, pp. 1-19 https://doi.org/10.1088/0957-0233/13/1/201