仿蝠鲼柔性潜水器翼型流场性能分析

Performance Analysis of Airfoil Flow Field of a Mannequin-like Flexible Submersible

摘要:

因为蝠鲼在运动时具有低噪声，机动性能好等优点，以蝠鲼作为仿生对象，结合动态网格技术， 通过对仿生蝠鲼的外形轮廓中某一截面进行流体动力分析，研究该截面轮廓在大变形情况下，不同频率、不同波长对周围流场特性的影响。仿真计算结果表明，在波长一定时，随着频率的升高，升力系数波动幅度变大，推力增大。在频率一定时，随着波长的增加，升力系数波动幅度变大，推力也增大。

关键词:仿生蝠鲼;柔性胸鳍;动网格

Abstract:

Because manta rays have the advantages of low noise and good maneuverability during motion，this paper uses manta rays as a biomimetic object. By combining dynamic mesh technology and analyzing the hydrodynamic force of a section of bionic manta’s outline，this paper studies the influence of different frequencies and different wavelengths on characteristics of the section’s surrounding flow field under large deformation conditions. The simulation calculation results show that when the wavelength is constant，as the frequency increases， the fluctuation coefficient of the lift coefficient becomes larger and the thrust increases. When the frequency is constant，as the wavelength increases，the fluctuation coefficient of the lift coefficient becomes larger and the thrust increases.

Key words:bionic manta rays;flexible pectoral fin;dynamic mesh