Single Vortex- and Vortex Array-Edge Interactions

单涡和涡列的相互作用 前缘/拐角/表面出现在各种实际的 应用程序，是确定本地化结构的核心 边缘的载荷和可能的振动、噪声辐射、初始 转捩/紊流边界层发展条件 边的下游，并在边的曲面上拖动。 第一 本研究的一个阶段考虑一排单涡 与前沿相互作用，重点是波长和 事件涡度场的尺度，作为初步的 在正在进行的调查中。 第二阶段解决 涡列-边缘相互作用 这些漩涡阵列将连接到 非线性超次谐波频率分量的产生 在上游剪切层的相互作用现象，这两者都是 不稳定层流和“湍流”发展的中心特征 有限流向范围的自由剪切流。

The interaction of single vortices and vortex arrays with leading-edges/corners/surfaces occurs in a variety of practical applications and is central to determining the localized structural loading and possible vibration of the edge, noise radiation, initial conditions for transitional/turbulent boundary layer development downstream of the edge, and drag on the surface of the edge. The first phase of this investigation considers a row of single vortices interacting with the leading-edge, with emphasis on the wavelength and scale of the incident vorticity field, as an extension of preliminary studies in the ongoing investigation. The second phase addresses vortex array-edge interaction. These vortex arrays will be linked to generation of super- and subharmonic frequency components of nonlinear interaction phenomena in the upstream shear layer, both of which are central features in development of unstable laminar and "turbulent" free shear flows of finite streamwise extent.