开设内槽翼型的水动力性能数值模拟

Numerical simulation of hydrodynamic performance of hydrofoil with inner groove

[目的]水下翼型具有减阻和节能的特点,因此,常应用于高性能船舶的舵和减摇鳍的设计之中。从目前对翼型的水动力性能研究来看,对翼型进行一定程度的改进,如开设内槽、增设前缘结节等,均会使翼型的水动力性能得到显著提升。为研究开设不同形式的内槽对翼型水动力性能的影响并探求相关作用机理,开展相关研究。[方法]对NACA0012型号的翼型开设内槽,利用计算流体力学的方法对具有不同内槽形式的翼型进行水动力计算。[结果]结果表明:将椭圆形式的内槽开设在翼型前缘对翼型水动力性能的提升最为显著,而为了保证内槽处水流的平稳流动,内槽应有一定的宽度。[结论]研究成果能够对船用舵的改进起到一定的参考作用。

[Objectives]Underwater hydrofoils have the characteristics of drag reduction and energy conservation.They are often used in the design of rudder and fin stabilizers for high-performance ships.From current research on the hydrodynamic performance of hydrofoils,such improvements as opening the inner groove and adding a leading edge nodule can significantly improve their hydrodynamic performance.[Methods]In this paper,an NACA0012 hydrofoil with internal slots is improved,the influence of different internal slots on the hydrodynamic performance of the hydrofoil is studied by means of computational fluid mechanics,and the relevant action mechanism is explored.[Results]Finally,it is concluded that the hydrodynamic performance of the hydrofoil can be improved most significantly by placing the elliptical inner groove at the leading edge of the hydrofoil,and the inner groove should have a certain width to ensure a smooth flow.[Conclusions]The results of this study can play a certain role in the improvement of ship rudders.