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《Journal of Engineering Thermophysics》 2012-05
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Numerical Study of the Impact of Hydrofoil Surface Roughness on Cavitation Suppression

DAI Yue-Jin~(1,2) ZHANG Yuan-Yuan~(1,2) HUANG Dian-Gui~(1,2) (1.Shanghai Institute of Applied Mathematics and Mechanics,Shanghai University,Shanghai 200072,China; 2.Shanghai Key Laboratory of Mechanics in Energy Engineering,Shanghai 200072,China)  
To study the effectiveness of hydrofoil surface roughness on cavitation suppression,a rough area is added on the suction surface of a modified NACA 16 airfoil in this study and then the hydrodynamic properties of the airfoil and the flow field around it are simulated.Therefore, the hydrofoil's lift and drag coefficients,minimum pressure coefficients on the suction surface and turbulent kinetic energy near the surface of hydrofoil can be obtained.Numerical results suggest that with the increase of the width and height of the added roughness area,the pressure of flow field around the hydrofoil can be significantly increased,which makes the minimum pressure become higher than the saturated vapor pressure of the fluid.As a result,the cavitation inception can be delayed and even suppressed.This study provides reference points for understanding the effect of surface roughness on the anti-cavitation performance of a hydrofoil.
【Fund】: 国家自然科学基金资助项目(No.10972133;No.91130027)
【CateGory Index】: O352
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