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首页> 外文期刊>Physics of fluids >Dynamic interference of two anti-phase flapping foils in side-by-side arrangement in an incompressible flow
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Dynamic interference of two anti-phase flapping foils in side-by-side arrangement in an incompressible flow

机译：不可压缩流动中双侧布置中两个抗相拍摄箔的动态干扰

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摘要

A two-dimensional computational hydrodynamic model is developed to investigate the propulsive performance of a flapping foil system in viscous incompressible flows, which consists of two anti-phase flapping foils in side-by-side arrangement. In the simulations, the gap between the two foils is varied from 1.0 to 4.0 times of the diameter of the semi-circular leading edge; the amplitude-based Strouhal number is changed from 0.06 to 0.55. The simulations therefore cover the flow regimes from negligible to strong interference in the wake flow. The generations of drag and thrust are investigated as well. The numerical results reveal that the counter-phase flapping motion significantly changes the hydrodynamic force generation and associated propulsive wake. Furthermore, the wake interference becomes important for the case with a smaller foil-foil gap and induces the inverted Benard von Karman vortex streets. The results show that the hydrodynamic performance of two anti-phase flapping foils can be significantly different from an isolated pitching foil. Findings of this study are expected to provide new insight for developing hydrodynamic propulsive systems by improving the performance based on the foil-foil interaction. Published by AIP Publishing.
机译：开发了一种二维计算流体动力学模型，以研究粘性箔系统在粘性​​不可压缩流动中的推进性能，这由双侧布置中的两个抗相翼箔组成。在模拟中，两个箔之间的间隙从半圆形前缘直径的1.0到4.0倍变化;基于幅度的Strouhal数从0.06变为0.55。因此，模拟覆盖流动制度可忽略不计在唤醒流动中的强烈干扰。还研究了一代拖曳和推力。数值结果表明，反相拍打运动显着改变了流体动力产生和相关的推进唤醒。此外，唤醒干扰对于具有较小箔箔间隙的情况而言变得重要，并且诱导倒立的Benard Von Karman涡流街道。结果表明，两个抗相拍摄箔的流体动力学性能可以显着不同于隔离的俯仰箔。该研究的结果预计通过基于箔箔相互作用改善性能，为开发流体动力学推进系统提供新的洞察力。通过AIP发布发布。

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  • 来源
    《Physics of fluids》 |2017年第3期|共12页
  • 作者

    Bao Y.; Zhou D.; Tao J. J.; Peng Z.; Zhu H. B.; Sun Z. L.; Tong H. L.;

  • 作者单位

    Shanghai Jiao Tong Univ Sch Naval Architecture Ocean &

    Civil Engn Dept Civil Engn Shanghai 200240 Peoples R China;

    Shanghai Jiao Tong Univ Sch Naval Architecture Ocean &

    Civil Engn Dept Civil Engn Shanghai 200240 Peoples R China;

    Peking Univ Dept Mech &

    Aerosp Engn Coll Engn CAPT Beijing 100871 Peoples R China;

    Univ Notre Dame Dept Aerosp &

    Mech Engn Notre Dame IN 46556 USA;

    Shanghai Jiao Tong Univ Sch Naval Architecture Ocean &

    Civil Engn Dept Civil Engn Shanghai 200240 Peoples R China;

    Peking Univ Dept Mech &

    Aerosp Engn Coll Engn CAPT Beijing 100871 Peoples R China;

    Inner Mongolia Vocat Coll Chem Engn Hohhot 010070 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 流体力学;
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