Force production mechanisms for a flat plate wing at low reynolds numbers (Invited)
Force production mechanisms for a flat plate wing at low reynolds numbers (Invited)
复制标题
低雷诺数平板翼的力产生机制（特邀）
DOI：
10.2514/6.2018-0816
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发表时间：
2018
影响因子：
3.6
通讯作者：
H. Babinsky
中科院分区：
文献类型：
--
作者：
S. Corkery;H. Babinsky
© 2018，美国航空航天学会，AIAA。版权所有。微型飞行器 (MAV) 在高度不稳定且经常分离的流动条件下运行，这些条件远远超出了传统升力面的通常设计空间。本文旨在结合理论，并简单解释这种不稳定和分离流的力产生背后的物理机制，涉及附加质量和循环（涡动力学）效应。粒子图像测速 (PIV) 和流可视化还用于表明“非循环”附加质量力负责产生与机翼表面结合的涡量，因此可能与流场中的自由涡流混淆。 “附加质量涡度”的变化以及由此产生的力被证明与流动拓扑无关，并且可能与粘性效应无关，边缘条件除外。另外还描述并使用了一种通过 PIV 测量简单量化束缚涡度分布的技术。
© 2018, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved. Micro Air Vehicles (MAVs) operate in highly unsteady and often separated flow conditions which are well outside the usual design space of conventional lifting surfaces. This paper aims to coalesce theory and simply explain the physical mechanisms behind force production for such unsteady and separated flows with regards to added mass and circulatory (vortex dynamics) effects. Particle Image Velocimetry (PIV) and flow visualisation are additionally used to show that the ’non-circulatory’ added mass forces are responsible for production of vorticity bound to the wing surface, thus can be confused with free vortices in the flow field. Changes to the ’added mass vorticity’ and thus forces derived from this are shown to be independent of flow topology and perhaps viscous effects in general with exception to edge conditions. A technique to simply quantify the distribution of the bound vorticity from PIV measurements is additionally described and utilised.