풍동 실험시 요트 세일 공력에 미치는 차폐효과에 대한 수치해석
Numerical Analysis of Blockage Effects on Aerodynamic Forces for Yacht Sails in Wind Tunnel Experiment
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초록
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.
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.
참고문헌 (2)
- "요트의 Main세일과 Jib 세일 사이의 간섭 효과에 대한 수치해석", 42(1), pp.24~33 (2005)
- "30피트급 요트의 선형개발 및 성능 추정", 42(1), pp.34~42 (2005)