NACA 0012摆动水翼水动力特性的二维数值模拟

Chinese Journal of Ship Research - - News -

1 200240上海交通大学 海洋工程国家重点实验室,上海2 200240高新船舶与深海开发装备协同创新中心,上海

吕元博1,2,田新亮1,2,李欣1,2,宋春辉 1,2 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NACA 0012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 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;平均推推力系数与主动旋转的相比小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。关键词:波浪滑翔机;被动摆动;限位角;推进性能中图分类号:U661.3 文献标志码:A DOI:10.3969/j.issn.1673-3185.2018.02.002

Two-dimensional numerical simulation of NACA 0012 flapping foil hydrodynamics

LV Yuanbo1,2,TIAN Xinliang1,2,LI Xin1,2,SONG Chunhui1,2 1 State Key Laboratory of Ocean Engineering,Shanghai Jiao Tong University,Shanghai 200240,China 2 Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai 200240,China

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. Key words:wave glider;passive oscillating;limit angle;propulsive performance

Newspapers in Chinese (Simplified)

Newspapers from China

© PressReader. All rights reserved.