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Numerical investigation of the effects of different parameters on the thrust performance of three dimensional flapping wings

机译：不同参数对三维襟翼推力性能影响的数值研究

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摘要

After billions of years of evolution, many creatures employing flapping wing in nature tend to have excellent flight capabilities. To understand the bionic wings flow mechanism will be helpful to design high performance underwater vehicles and new conception aircrafts. The geometric parameters, kinematic parameters and flow parameters have great effects on the bionic wings thrust performance. Facing the diverse parameters, it's very difficult to explore the three-dimensional (3D) bionic flapping wing flow mechanism with traditional numerical simulation method. In this paper, a general large-scale parallel solver using Immersed Boundary-Lattice Boltzmann Method (IB-LBM) was developed. The evolution procedures of the 3D flapping wing leading edge vortex and wake flow vortex structures were analyzed in detail. Our study explained the 3D flapping wing thrust performance variation with different wing shapes, aspect ratios and pitch-bias angles of attack. Using Chinese supercomputer TianHe-II presents a wide range of possibilities for the further development of parallel IB-LBM, employing tens of millions grids will help us to obtain more complete and accurate 3D flapping wing flow field information. It's indicated that the obtuse wing has the best thrust performance compared with other sharp wing shapes. With the increase of the aspect ratio, the thrust coefficient of flapping wing increases firstly and then decreases, and with pitch-bias angles of attack increases, the thrust coefficient decreases quickly or even shown resistance phenomenon at the large pitch-bias angel of attack. The discussion of these parameters will provide a theoretical basis for improving flapping-like vehicles propulsive performance. (C) 2018 Elsevier Masson SAS. All rights reserved.
机译：经过数十亿年的进化，许多在自然界中采用拍打翅膀的生物往往具有出色的飞行能力。了解仿生机翼流动机理将有助于设计高性能水下航行器和新概念飞机。几何参数，运动学参数和流动参数对仿生机翼的推力性能影响很大。面对各种各样的参数，很难用传统的数值模拟方法来探索三维（3D）仿生扑翼的流动机理。在本文中，开发了一种使用浸没边界格子玻尔兹曼方法（IB-LBM）的大型并行求解器。详细分析了3D扑翼前缘涡流和尾流涡流结构的演化过程。我们的研究解释了3D襟翼推力性能随机翼形状，纵横比和俯仰角和迎角的变化而变化。使用中国超级计算机TianHe-II为并行IB-LBM的进一步开发提供了广泛的可能性，使用数以千万计的网格将帮助我们获得更完整和准确的3D扑翼机流场信息。表明钝角机翼与其他尖锐机翼相比具有最佳的推力性能。随着长宽比的增大，襟翼的推力系数先增大然后减小，随着俯仰角迎角的增加，推力系数迅速减小，甚至在大的俯仰角迎角出现阻力现象。这些参数的讨论将为改善扑扑类车辆的推进性能提供理论依据。 （C）2018 Elsevier Masson SAS。版权所有。

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  • 来源
    《Aerospace science and technology》 |2019年第1期|431-445|共15页
  • 作者

    Gong Chunlin; Han Jiakun; Yuan Zongjing; Fang Zhe; Chen Gang;

  • 作者单位

    Northwestern Polytech Univ, Sch Astronaut, Shaanxi Aerosp Flight Vehicle Design Key Lab, Xian, Shaanxi, Peoples R China;

    Xi An Jiao Tong Univ, Sch Aerosp, State Key Lab Strength & Vibrat Mech Struct, Xian, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, Shaanxi Key Lab Serv Environm & Control Flight Ve, Xian, Shaanxi, Peoples R China;

    Xi An Jiao Tong Univ, Shaanxi Key Lab Serv Environm & Control Flight Ve, Xian, Shaanxi, Peoples R China;

    Northwestern Polytech Univ, Sch Astronaut, Shaanxi Aerosp Flight Vehicle Design Key Lab, Xian, Shaanxi, Peoples R China;

    Xi An Jiao Tong Univ, Sch Aerosp, State Key Lab Strength & Vibrat Mech Struct, Xian, Shaanxi, Peoples R China|Xi An Jiao Tong Univ, Shaanxi Key Lab Serv Environm & Control Flight Ve, Xian, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lattice-Boltzmann method; Immersed boundary method; Flapping wing; Thrust performance; Vortex structure;

    机译：格子-玻尔兹曼法;浸入边界法;襟翼;推力性能;涡结构;

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