为了研究运动自由度对水下仿生扑翼运动性能的影响，对海洋生物鳍状前肢运动特点进行分析，建立基于简谐运动的不同自由度扑翼的运动模型。采用计算流体力学的方法，基于Realizable $k - \varepsilon $湍流模型，结合动网格技术对单自由度、二自由度和三自由度扑翼的性能进行计算对比，并对流场开展了分析。计算结果表明，二自由度扑翼最具经济性，扑翼运动过程中的前沿涡和尾涡随运动的自由度发生改变，且对扑翼的性能产生了显著影响。研究结果对水下仿生扑翼推进技术的研究提供了重要参考。
In order to study the effect of freedom of motion on performance of underwater bionic flapping foil, through the analysis of marine life's fin forelimb movement characteristics, the flapping foil motion model with different freedom is established based on simple harmonic motion. Using computational fluid dynamics method, based on Realizable $k - \varepsilon $ turbulence model, combined with dynamic mesh technology, the performance of single-degree-of-freedom, two-degree-of-freedom and three-degree-of-freedom flapping foil are calculated and compared, and the flow field is analyzed. The calculation results show that the two-degree-of-freedom flapping foil is the most economical; the leading vortex and trailing vortex generated by the motion of flapping foil change with the degree of freedom，and have a significant effect on the performance of flapping foil. The research results provide an important reference for the research of underwater bionic flapping foil propulsion technology.
2022,44(13): 107-110 收稿日期：2021-09-26
DOI：10.3404/j.issn.1672-7649.2022.13.024
分类号：TP242.3
作者简介：陈良军(1985-),男,硕士,工程师,主要研究领域为水下航行器结构设计与分析
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