Based on the finite volume method and RNG k-ε turbulent model, the flow characters of a 3dimension rectangle NACA2410 hydrofoil near free surface was calculated and compared with the simulation test results. The result shows that a clear consistency is revealed when the 3D's and 2D's lift and drag calculation results are compared to the model test data and the 3D' results are the more accurate than those of 2D's. And a primary investigation was done to the lift and drag of this hydrofoil with different attack angles, submergences and velocities under the viscous flow conditions. An optimal lift drag ratio can be found at the attack angle about 6° near free surface when Fnc is 1.65. The strong nonlinear characters of the lift will be shown with the increase of Fnc when submergence is less than one chord length.%采用有限体积法、RNGκ-ε湍流模式对二维及三维水翼近水面航行水动力进行了数值模拟,并与模型试验结果进行了比较分析.结果表明:当水翼浸深与弦长之比大于1时,数值计算方法与试验结果一致,且三维计算精度略高于二维.初步研究了NACA2410水翼在粘性流中近水面航行时升力、阻力特性随攻角、浸深、速度变化的规律,指出该型水翼以Fnc=1.65在近水面航行时有利攻角约为6°、浸深比小于1时,随着傅汝德数的增大,水翼的升力表现出强非线性.
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