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 Blockage Effects on Aerodynamic Forces for Yacht Sails in Wind Tunnel Experiment

풍동 실험시 요트 세일 공력에 미치는 차폐효과에 대한 수치해석

  • Lee, Pyoung-Kuk (Dept. of Naval Architecture & Ocean Eng., Chungnam National Univ.) ;
  • Yoo, Jae-Hoon (Korea Ocean Research & Development Institute) ;
  • Kim, Hyoung-Tae (Dept. of Naval Architecture & Ocean Eng., Chungnam National Univ.)
  • 이평국 (충남대학교 선박해양공학과) ;
  • 유재훈 (한국해양연구원 해양시스템안전연구소) ;
  • 김형태 (충남대학교 선박해양공학과)
  • Published : 2006.08.01
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Abstract

Due to the limitation of size of the test section, blockage effects could not be avoided in the model test of yacht sails for common wind tunnels. In this paper, a numerical analysis is performed to investigate the blockage effects on the lift and drag forces measured from wind tunnel experiments for a 30 feet sloop yacht sail. Complex airflows around the jib and main sails including three-dimensional flow separations are calculated for various close-hauled conditions. It is found that the blockage of a wind tunnel changes the flow separation and consequently the lift and drag forces of the sails, especially the main sail, reduce and increase, respectively, due to the blockage effects.

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References

  1. 유재훈, 박일룡, 김진, 안해성, 반석호, 이평국, 2005a, '요트의 Main세일과 Jib 세일 사이의 간섭 효과에 대한 수치해석,' 대한조선학회 논문집, 제 42권, 제 1호, pp. 24-33 https://doi.org/10.3744/SNAK.2005.42.1.024
  2. 유재훈, 반석호, 안해성, 김진, 김상현, 2005b, '30피트급 요트의 선형개발 및 성능 추정,' 대한조선학회 논문집, 제 42권, 제 1호, pp. 34-42 https://doi.org/10.3744/SNAK.2005.42.1.034
  3. FLUENT 3.1 user's guide

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