| Citation: | MOU Xiaolei, XU Na. Effects of lateral wind on aerodynamic force of a flapping wing[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(11): 2310-2315. doi: 10.13700/j.bh.1001-5965.2017.0210(in Chinese)
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Insects are often disturbed by lateral wind when flying in nature. Thus understanding the variation of aerodynamic force of the flapping wing under the lateral wind is significant to the research on flying mechanism of insects. The fluid fields around the flapping wing under the lateral winds were simulated using the method of computational fluid dynamic (CFD), which were then compared with the hovering situation (with no lateral wind), and the effects of the dynamic characteristics of flapping wing was investigated from two aspects of the strength and direction of the lateral wind. The results indicate that the lateral wind has two contributions to the aerodynamics of the flapping wing:one is "changing-relative-velocity" effect, and the other is "changing-LEV-axial-velocity" effect. Lateral winds in different directions (from wing-tip to wing-root or from wing-root to wing-tip) have obviously different effect on the aerodynamics; however, under lateral winds with different intensities but the same direction, the variations of aerodynamic force are similar, and there are only numerical differences.
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