NACA 0012摆动水翼水动力特性的二维数值模拟

吕元博; 田新亮; 李欣; 宋春辉

doi:10.3969/j.issn.1673-3185.2018.02.002

NACA 0012摆动水翼水动力特性的二维数值模拟

Two-dimensional numerical simulation of NACA 0012 flapping foil hydrodynamics

摘要

摘要:
目的为了研究水翼的水动力性能对波浪滑翔机设计的影响，
方法针对波浪滑翔机运动时水翼的摆动特点，基于STAR-CCM+软件的流体与固体相互作用（DFBI）模块，采用SST k-ω湍流模型，模拟出滑翔机水翼在一个周期内主动升沉运动下的被动摆动过程，研究限位角、波高、波浪频率等因素对NACA 0012型水翼的推力系数的影响。
结果仿真结果表明，被动旋转方法可以有效模拟水翼摆动过程，且被动旋转方法所得平均推力系数与主动旋转的相比小30%左右；滑翔机水翼最大限位角在20°附近时，水翼的水动力性能较优；平均推力系数在一定范围内随波高、波浪频率的增加而增大。
结论这一结果可为研究波浪滑翔机的推进性能以及在不同海况条件下的水动力性能提供参考。

Abstract:
Objectives In order to study the impact of the hydrodynamic performance of foil in the design of a wave glider,
Methods on account of the characteristics of the oscillating foil when the wave glider is heaving, and based on the Dynamic Fluid Body Interaction(DFBI) module in STAR-CCM+ with the SST k-ω turbulence model, the passive oscillating process of foil when it is forced to heave is simulated. The effects of limit angles, wave heights and frequencies on the thrust coefficient of NACA 0012 flapping foil are investigated.
Results We find that the passive rotation method can effectively simulate foil oscillating process, and its thrust coefficient is about 30% smaller than the coefficient obtained by the active rotation method. Moreover, the maximum limit angle of a wave glider of around 20° gives a better hydrodynamic performance. The numerical simulation result indicate that the thrust coefficient increases with the increase of wave height and wave frequency in a certain region.
Conclusions This can provide a reference for propulsive performance and hydrodynamic performance under different states of the sea.

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