On the Influence of Pitching and Acceleration on Vortex Dynamics Around Low-Aspect-Ratio Rectangular Wings
On the Influence of Pitching and Acceleration on Vortex Dynamics Around Low-Aspect-Ratio Rectangular Wings
复制标题
俯仰和加速度对小展弦比矩形翼涡动力学的影响
作者：
Ryan Jantzen;K. Taira;Kenneth Granlund;M. Ol
摘要：在本研究中，我们使用数值模拟来研究在低雷诺数下经历两个正则运动的小展弦比平板上的三维流动。第一种运动是由初始以0度入射角平移并绕其前缘俯仰至45度的挡板限定的。第二种运动是在静止的流体中以恒定的45度入射角入射板，其中板加速到恒定的速度。本研究的重点是研究这些简化运动对非定常涡动力学的影响，特别是小展弦比平板上前缘、后缘和叶尖涡的形成和演变。为了进一步了解这些运动对复杂流场的影响，对雷诺数、展弦比和俯仰角速度进行了参数研究。
Abstract : In the present study, we use numerical simulations to investigate the three-dimensional flows over low-aspect-ratio at plates undergoing two canonical motions at low Reynolds numbers. The first motion is defined by the at plate initially translating at 0deg incidence that pitches to 45deg about its leading edge. The second motion consists of the at plate at a constant 45deg incidence in a quiescent fluid, where the plate accelerates up to a constant velocity. The focus of this study is to investigate the influence of these simplified motions on the unsteady vortex dynamics, specifically the formation and evolution of the leading- edge, trailing-edge, and tip vortices over the low-aspect-ratio plate. A parameter study of Reynolds number, aspect ratio and pitch rate is performed to further understand the effect of these motions on the complex flow field.