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http://dx.doi.org/10.3744/SNAK.2006.43.4.431

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

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.)
Publication Information
Journal of the Society of Naval Architects of Korea / v.43, no.4, 2006 , pp. 431-439 More about this Journal
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.
Keywords
Sloop yacht; Jib sail; Main sail; Lift force; Drag force; Blockage effect;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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2 FLUENT 3.1 user's guide
3 유재훈, 반석호, 안해성, 김진, 김상현, 2005b, '30피트급 요트의 선형개발 및 성능 추정,' 대한조선학회 논문집, 제 42권, 제 1호, pp. 34-42   과학기술학회마을   DOI