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安装在微型无人机上的仿生网格二面角和攻角气动效应的计算研究

Computational Study of Aerodynamic Effects of the Dihedral and Angle of Attack of Biomimetic Grids Installed on a Mini UAV.

作者信息

Bardera Rafael, Rodríguez-Sevillano Ángel Antonio, Barroso Barderas Estela, Matias Garcia Juan Carlos

机构信息

Instituto Nacional de Técnica Aeroespacial (INTA), Experimental Aerodynamics, Torrejón de Ardoz, 28850 Madrid, Spain.

Escuela Técnica Superior de Ingeniería Aeronáutica y del Espacio (ETSIAE), Universidad Politécnica de Madrid (UPM), 28040 Madrid, Spain.

出版信息

Biomimetics (Basel). 2023 Dec 29;9(1):12. doi: 10.3390/biomimetics9010012.

DOI:10.3390/biomimetics9010012
PMID:38248586
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10812939/
Abstract

In this paper, a numerical analysis of a biomimetic unmanned aerial vehicle (UAV) is presented. Its wings feature three grids at the tip similar to the primary feathers of birds in order to modify the lift distribution over the wing and help in reducing the induced drag. Numerical analysis using computational fluid dynamics (CFD) is presented to analyze the aerodynamic effects of the changes in dihedral and angle of attack (with respect of the rest of the wing) of these small grids at the tip. The aerodynamic performances (lift, drag, and efficiency) and rolling capabilities are obtained under different flight conditions. The effects of changing the dihedral are small. However, the change in the grid angle of attack increases aerodynamic efficiency by up to 2.5 times when the UAV is under cruise flight conditions. Changes to the angle of attack of the grids also provide increased capabilities for rolling. Finally, boundary values of the pressure coefficient and non-dimensional velocity contours are presented on the surfaces of the UAV, in order to relate the aerodynamic results to the aerodynamic patterns observed over the wing.

摘要

本文对一种仿生无人机进行了数值分析。其机翼末端有三个类似鸟类初级飞羽的网格，用于改变机翼上的升力分布并帮助减小诱导阻力。本文采用计算流体动力学（CFD）进行数值分析，以研究这些末端小网格的二面角和攻角（相对于机翼其他部分）变化所产生的气动效应。在不同飞行条件下获得了气动性能（升力、阻力和效率）以及横滚能力。改变二面角的影响较小。然而，当无人机处于巡航飞行条件时，网格攻角的变化可使气动效率提高达2.5倍。网格攻角的改变还增强了横滚能力。最后，给出了无人机表面的压力系数边界值和无量纲速度等值线，以便将气动结果与机翼上观察到的气动模式联系起来。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/7f740988bef0/biomimetics-09-00012-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/0e4b1ae0d9cd/biomimetics-09-00012-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/a9d153fa047e/biomimetics-09-00012-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/9393633ac5ea/biomimetics-09-00012-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/47f208233699/biomimetics-09-00012-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/70a909365f3f/biomimetics-09-00012-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/cb5c26c29ee2/biomimetics-09-00012-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/7bbc57046e63/biomimetics-09-00012-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/96f8b0f09292/biomimetics-09-00012-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/24f6862a8c98/biomimetics-09-00012-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/3599294b886d/biomimetics-09-00012-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/f10a329b6bbb/biomimetics-09-00012-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/daf76fbb174c/biomimetics-09-00012-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/f721ed53f8b6/biomimetics-09-00012-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/7f740988bef0/biomimetics-09-00012-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/0e4b1ae0d9cd/biomimetics-09-00012-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/a9d153fa047e/biomimetics-09-00012-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/9393633ac5ea/biomimetics-09-00012-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/47f208233699/biomimetics-09-00012-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/70a909365f3f/biomimetics-09-00012-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/cb5c26c29ee2/biomimetics-09-00012-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/7bbc57046e63/biomimetics-09-00012-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/96f8b0f09292/biomimetics-09-00012-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/24f6862a8c98/biomimetics-09-00012-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/3599294b886d/biomimetics-09-00012-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/f10a329b6bbb/biomimetics-09-00012-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/daf76fbb174c/biomimetics-09-00012-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/f721ed53f8b6/biomimetics-09-00012-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f3fb/10812939/7f740988bef0/biomimetics-09-00012-g014.jpg

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本文引用的文献

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Multi-cored vortices support function of slotted wing tips of birds in gliding and flapping flight.多核涡流有助于鸟类在滑翔和扑翼飞行中槽状翼尖的功能。
J R Soc Interface. 2017 May;14(130). doi: 10.1098/rsif.2017.0099.
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Drag reduction by wing tip slots in a gliding Harris' hawk, Parabuteo unicinctus.Harris鹰（Parabuteo unicinctus）滑翔时翼尖缝隙的减阻作用
J Exp Biol. 1995;198(Pt 3):775-81. doi: 10.1242/jeb.198.3.775.