Numerical Analysis of Flapping Wing
Numerical Analysis of Flapping Wing
复制标题
扑翼数值分析
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Takeo Okunuki
中科院分区：
文献类型：
--
作者：
H. Matsutani;E. Morishita;H. Koyama;Takeo Okunuki
微型飞行器（MAV）非常小，飞行速度很低。因此，它们的机翼是平板或薄膜，因为雷诺数很低。对于微型飞行器，建议使用扑翼来像鸟类和昆虫一样同时产生升力和推力。本研究利用浸入边界法的新颖思想，对平板绕流作定常、升沉及顺桨的数值分析。该方法的优点是网格生成容易，计算量小。网格不是贴体的，而是直线的。板的形状用外力来表示。计算结果与解析解和实验照片进行了比较。在静止平板中，阻力系数和速度分布与Blasius解一致。在垂荡板中，升力系数和力矩系数接近于Theodorsen函数的解析解。压力等值线和流线表明板存在于网格中。在羽流板中，涡量分布与实验结果有相似的趋势。
Micro Air Vehicles (MAVs) are very small and fly at low speeds. Therefore, their wings are flat plates or membranes because the Reynolds number is very low. For MAVs, a flapping wing is proposed to generate lift and thrust simultaneously like birds and insects. In this study, the Immersed Boundary Method with the original ideas is used to analyze the airflow around stationary, heaving and feathering flat-plate numerically. The advantages of this method are easiness of the grid generation and less amount of calculation. The grid is not body-fitted but rectilinear. And the plate is expressed by the external force. The computational results are compared with the analytical solutions and the experimental photo. In the stationary plate, the drag coefficient and the velocity distribution agree with the Blasius solution. In the heaving plate, the lift and moment coefficients are close to the analytical solution with the Theodorsen function. And the pressure contours and the streamlines show the plate exists in the grid. In the feathering plate, the vorticity distribution and the experimental result show the similar trend.