俯仰和倾伏翼型的正弦阵风产生
Sinusoidal-gust generation with a pitching and plunging airfoil
摘要：
在实验范围内的均匀，周期性阵风扰动的产生证明使用一个单一的振荡翼型。一个俯仰和垂荡对称翼型被建议作为一个更简单的替代现有的阵风生成方法。非定常空气动力学的Theodorsen理论被用作分析工具，以指示产生翼型下游的明确定义的正弦阵风所需的运动学。这些分析预测改善了翼型引起的垂直速度波动的对称性，并使振荡翼型产生的涡量影响最小化。该装置示出，以产生平滑，可重复的阵风与高振幅和降低的频率相比，在文献中的其他阵风生成机制。此外，通过翼型运动运动学控制下游流动特性在实验空气动力学、旋翼机和轻型航空器的设计以及生物推进中具有应用。
英文摘要：
The generation of uniform, periodic gust disturbances in an experimental context is demonstrated using a single oscillating airfoil. A pitching and heaving symmetric airfoil is suggested as a simpler alternative to existing gust-generation methods. The Theodorsen theory of unsteady aerodynamics is used as an analytical tool to dictate the kinematics necessary to produce well-defined sinusoidal gusts downstream of the airfoil. These analytic predictions improve the symmetry of fluctuations in the vertical velocity induced by the airfoil, as well as minimize the influence of vorticity shed by the oscillating airfoil. The apparatus is shown to produce smooth, repeatable gusts with high amplitudes and reduced frequencies compared to other gust-generation mechanisms in the literature. Furthermore, the control of downstream flow properties by airfoil motion kinematics has applications in experimental aerodynamics, the design of rotorcraft and light aerial vehicles, and biological propulsion.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
