...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of aerospace engineering >Influence of Spanwise Twisting and Bending on Lift Generation in MAV-Like Flapping Wings
【24h】

Influence of Spanwise Twisting and Bending on Lift Generation in MAV-Like Flapping Wings

机译：翼状扭曲和弯曲对MAV类拍击翼中升力产生的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A numerical-simulation tool is developed that is well suited for modeling the unsteady and nonlinear aerodynamics of flying insects and small birds as well as biologically inspired flapping-wing micro air vehicles (MAVs). The tool consists of a combination of (1) an aerodynamic model that is an extension of the widely used three-dimensional (3D) general unsteady vortex-lattice model, and (2) a general kinematic model that is capable of describing multiple deformation patterns of lifting surfaces, such as spanwise twisting, in-plane and out-of-plane bending, and any combination of these. Moreover, the present tool offers an attractive compromise between computational cost and fidelity and is ideally suited to be combined with computational structural dynamics to perform aeroelastic analyses. The present tool was successfully validated by comparing some of the present results with those obtained from existing numerical models based on both Euler equations and vortex-lattice codes and with some experimental data. Using the numerical framework developed and for the deformation mechanisms analyzed here, two distinctly different effects were found: the wing span's twisting and in-plane bending affect the lift in specific zones of the stroke cycle (called "local behavior"); and the wing span's out-of-plane bending affects the lift throughout the stroke cycle (called "global behavior"). In addition, the results found show that the wing's flexibility certainly affects the lift production, at least for some flights at small scales. These findings definitely suggest the strong likelihood that the unsteady vortex-lattice method combined with a general kinematic model can be a very accurate and efficient tool for future aeroelastic studies. (C) 2016 American Society of Civil Engineers.
机译：开发了一种数值模拟工具，非常适合于模拟飞行昆虫和小型鸟类以及受生物启发的扑翼微型飞行器（MAV）的不稳定和非线性空气动力学。该工具由以下部分组成：（1）空气动力学模型，该模型是广泛使用的三维（3D）常规非定常涡旋光栅模型的扩展，以及（2）能够描述多种变形模式的常规运动学模型提升表面，例如翼展方向扭曲，平面内和平面外弯曲以及这些的任意组合。而且，本工具在计算成本和保真度之间提供了有吸引力的折衷，并且理想地适合与计算结构动力学相结合以执行气动弹性分析。通过将一些当前结果与从现有的基于Euler方程和涡旋格代码的数值模型获得的结果进行比较，并与一些实验数据进行比较，成功地验证了该工具。使用开发的数值框架并针对此处分析的变形机制，发现了两个截然不同的影响：机翼跨度的扭曲和面内弯曲会影响冲程周期特定区域中的升力（称为“局部行为”）；并且机翼跨度的平面外弯曲会在整个冲程周期内影响升力（称为“整体行为”）。此外，发现的结果表明，机翼的柔韧性无疑会影响升力的生产，至少对于某些小规模的飞行而言。这些发现无疑表明，很不稳定的涡流-格子方法与一般的运动学模型相结合可以成为未来气动弹性研究的非常准确和有效的工具。 （C）2016年美国土木工程师学会。

著录项

  • 来源
    《Journal of aerospace engineering》 |2017年第1期|04016079.1-04016079.15|共15页
  • 作者

    Roccia Bruno A.; Preidikman Sergio; Verstraete Marcos L.; Mook Dean T.;

  • 作者单位

    Univ Nacl Cordoba, Sch Exact Phys & Nat Sci, Dept Struct, Av Velez Sarsfield 299, RA-5000 Cordoba, Argentina|Natl Sci & Tech Res Council IDIT CONICET, Inst Adv Studies Engn & Technol, Av Velez Sarsfield 299, RA-5000 Cordoba, Argentina;

    Univ Nacl Cordoba, Sch Exact Phys & Nat Sci, Dept Struct, Av Velez Sarsfield 299, RA-5000 Cordoba, Argentina|Natl Sci & Tech Res Council IDIT CONICET, Inst Adv Studies Engn & Technol, Av Velez Sarsfield 299, RA-5000 Cordoba, Argentina;

    Univ Nacl Rio Cuarto, Sch Engn, Dept Basic Sci, Ruta Nacl 36 Km 601, RA-5800 Rio Cuarto, Argentina;

    Virginia Polytech Inst & State Univ, Dept Biomed Engn & Mech, Virginia Tech, Norris Hall,Room 333N,495 Old Turner St, Blacksburg, MA USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号