扑翼模型的气动力研究

A Study of Aerodynamics of a Flapping-Wing Model

  • 摘要: 为了研究扑翼的气动特性,以蜜蜂翅为参考对象建立了扑翼的运动学模型. 利用计算流体力学方法,研究了最大拍动角、频率、攻角对扑翼气动力特性的影响,通过分析扑翼拍动在1个周期的升力和阻力变化,阐释了扑翼保持高升力的原因. 计算结果表明,翻转运动是造成升力变化的主要因素;平均升力会随着最大拍动角和频率的增大而增大;并在攻角50°时达到最大;而各工况对平均阻力的影响可忽略不计.

     

    Abstract: A kinematic model of the flapping wing based on bees was investigated in this paper to analyze the aerodynamic characteristics. Taking advantage of the computational fluid dynamics technique, the effects of the maximum stoke angle, frequency and attack angle on the aerodynamics were studied. The reasons why the flapping wing can maintain high lift were demonstrated by analyzing the variations of lift and drag during a flapping cycle. Our analytic results reveal that the turning movement is the main factor causing the changes in lift. The average lift is improved as the maximum stoke angle and frequency increase, and the average lift reaches its maximum when the attack angle is 50°. Meanwhile, the working conditions have little impact on the average drag.

     

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