Biomimetic Wings for Micro Air Vehicles.

IF 3.4 3区 医学 Q1 ENGINEERING, MULTIDISCIPLINARY Biomimetics Pub Date : 2024-09-14 DOI:10.3390/biomimetics9090553
Giorgio Moscato, Giovanni P Romano
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Abstract

In this work, micro air vehicles (MAVs) equipped with bio-inspired wings are investigated experimentally in wind tunnel. The starting point is that insects such as dragonflies, butterflies and locusts have wings with rigid tubular elements (corrugation) connected by flexible parts (profiling). So far, it is important to understand the specific aerodynamic effects of corrugation and profiling as applied to conventional wings for the optimization of low-Reynolds-number aerodynamics. The present study, in comparison to previous investigations on the topic, considers whole MAVs rather than isolated wings. A planform with a low aperture-to-chord ratio is employed in order to investigate the interaction between large tip vortices and the flow over the wing surface at large angles of incidence. Comparisons are made by measuring global aerodynamic loads using force balance, specifically drag and lift, and detailed local velocity fields over wing surfaces, by means of particle image velocimetry (PIV). This type of combined global-local investigation allows describing and relating overall MAV performance to detailed high-resolution flow fields. The results indicate that the combination of wing corrugation and profiling gives effective enhancements in performance, around 50%, in comparison to the classical flat-plate configuration. These results are particularly relevant in the framework of low-aspect-ratio MAVs, undergoing beneficial interactions between tip vortices and large-scale separation.

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微型飞行器的仿生翼。
在这项工作中,我们在风洞中对装有生物启发翅膀的微型飞行器(MAV)进行了实验研究。研究的出发点是,蜻蜓、蝴蝶和蝗虫等昆虫的翅膀由刚性管状元件(波纹)和柔性部件(剖面)连接而成。到目前为止,重要的是要了解波纹和仿形应用于传统机翼的具体空气动力学效应,以优化低雷诺数空气动力学。与之前的相关研究相比,本研究考虑的是整个飞行器,而不是孤立的机翼。为了研究大入射角下大型翼尖涡流与翼面气流之间的相互作用,本研究采用了孔径与弦长比较低的平面形式。通过使用力平衡(特别是阻力和升力)测量全局空气动力负荷,以及使用粒子图像测速仪(PIV)测量翼面上的详细局部速度场,进行了比较。通过这种全局与局部相结合的调查,可以描述无人飞行器的整体性能,并将其与详细的高分辨率流场联系起来。结果表明,与传统的平板配置相比,机翼波纹和剖面相结合可有效提高性能,提高幅度约为 50%。这些结果与低展弦比无人飞行器的框架尤其相关,因为低展弦比无人飞行器正在经历翼尖涡流和大尺度分离之间的有益互动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Biomimetics
Biomimetics Biochemistry, Genetics and Molecular Biology-Biotechnology
CiteScore
3.50
自引率
11.10%
发文量
189
审稿时长
11 weeks
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