中文摘要：

为研究海流各个流动参数同时对水翼水动力学性能的影响,根据海流随机波动特点,选取海流的攻角、雷诺数和湍流强度3个因素,每个因素选取4个水平,进行了L16（43）正交试验设计,对16种方案下的海流发电用翼型NACA63440的水动力学性能进行了定常流动的数值模拟,分析海流的各个流动参数对水翼水动力学特性的影响规律。数值模拟结果表明：海流参数对水翼升阻系数影响的大小依次是湍流度,攻角,雷诺数;其中湍流强度和攻角对升阻力系数影响较为明显,而雷诺数对其影响较小;增加攻角可有效提高升阻比,但存在一极值,超过该极值,水翼将发生失速现象;增大雷诺数可适度提高水翼升阻比;水翼的前半部分是产生升力的主体区域,且在前缘上部存在最易空化的区域。研究结果为进一步研究水翼的水动力特性提供了有益的参考。

英文摘要：

With the aggravation of energy crisis in world,the energy of ocean current is greatly focused.At present,the most important application is the use of marine current turbine,the performance of which depends on the hydrodynamic performance of hydrofoil mostly.In order to study the influence of ocean current＇s parameters on hydrodynamic performance of hydrofoil,according to the characteristic of random fluctuation in ocean current,angle of attack,Reynolds Number and turbulence intensity are selected as three factors of orthogonal experiment in this paper,and every factor selects four influence levels to carry out a L16（43） orthogonal experiment.The hydrodynamic performance of hydrofoil NACA63440 that marine current turbine often applies is numerically simulated under steady flow condition for sixteen schemes,and the influence laws of ocean current＇s parameters on hydrodynamic performance of hydrofoil are analyzed in detail.The results of numerical simulation show that the influence of turbulence intensity on hydrodynamic performance of hydrofoil is maximal,the angle of attack is next,while Reynolds Number is minimal.The influence of turbulence intensity and angle of attack on lift coefficient and drag coefficient of hydrofoil is more evident.Increasing angle of attack can improve effectively lift-drag ratio,but it has a extremum.If angle of attack exceeds the critical value,the hydrofoil will appear stalling phenomenon.Increasing Reynolds Number can improve moderately lift-drag ratio.The forebody of hydrofoil is the main region that generates lift,and the top region of forebody is most vulnerable to cavitation.Above research conclusions will provide significant referrence for more hydrodynamic performance research of hydrofoil.