水翼型水上飞机水动性能数值计算及分析

采用空气动力和水动力耦合求解并结合动力学平衡方程方法对水翼型水上飞机水面起飞过程水动性能进行计算。使用Realizable k-ε模型对NACA0012三维地效机翼进行计算,验证空气动力计算方法。使用流体体积函数(VOF)方法对验证模型在不同弗汝德数下进行数值模拟,验证水动力计算方法。最后,对水翼型和双浮筒型水上飞机水面起飞过程进行数值计算,计算结果表明,水翼能够产生较大水动升力,当速度达到12 m/s时,水翼产生的水动升力将机身抬离水面;水翼水动升力峰值为6 395 N,约占飞机总升力的83%,双浮筒型水上飞机阻力增加较快,其阻力峰值约为水翼型水上飞机阻力峰值的1. 87倍,从而证明了水翼能够产生较大水动升力并能有效降低水上飞机的水动阻力。

Numerical Calculation and Analysis of Hydrodynamic Performance for Hydrofoil Seaplane

Aerodynamic and hydrodynamic coupling solution and dynamic equilibrium equations were used to calculate the hydrodynamic performance for hydrofoil seaplane during takeoff. Realizable k-e model was used to calculate NACA0012 three-dimensional ground effect wing and verify the aerodynamic calculation method. The VOF method was used to simulate the validation model under different Froude numbers to verify the hydrodynamic calculation method. Finally, the takeoff process of hydrofoil and double-float seaplane was numerically calculated. The results show that the hydrofoil can generate some hydrodynamic lift. When the speed reaches 12 m/s, the hydrodynamic lift generated by hydrofoil lifts the fuselage off the water surface; The peak hydrodynamic lift of hydrofoil is 6395 N, which accounts for 83% of the total lift of seaplane, and the drag of the double-float seaplane increases rapidly, and its peak drag is about 1.87 times that of the hydrofoil seaplane, which proves that the hydrofoil can generate large hydrodynamic lift and effectively reduce the hydrodynamic drag of the seaplane.