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풍동 실험시 요트 세일 공력에 마치는 차폐효과에 대한 수치해석Numerical Analysis of Blockage Effects on Aerodynamic Forces for Yacht Sails in Wind Tunnel Experiment
- Other Titles
- Numerical Analysis of Blockage Effects on Aerodynamic Forces for Yacht Sails in Wind Tunnel Experiment
- Issue Date
- 1-8월-2006
- Publisher
- 대한조선학회
- Keywords
- Sloop yacht; Jib sail; Mail sail; Lift force; Drag force
- Citation
- 대한조선학회 논문집, v.43, no.4, pp 431 - 439
- Pages
- 9
- Journal Title
- 대한조선학회 논문집
- Volume
- 43
- Number
- 4
- Start Page
- 431
- End Page
- 439
- 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 c1ose-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, especialIy the main sail, reduce and increase, respectively. due to the blockage effects.
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