Modeling Three Dimensional Effects on Cross Flow Instability from Leading Edge Dimples
Modeling Three Dimensional Effects on Cross Flow Instability from Leading Edge Dimples
复制标题
模拟前缘凹坑对横流不稳定性的三维影响
DOI：
10.1016/j.piutam.2015.03.041
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Ashworth R
中科院分区：
文献类型：
--
作者：
Ashworth R
在自然层流机翼前缘附近形成的浅凹坑可能发生在操作过程中，由于冰雹的影响，潜在地改变稳定性特性，并导致凹坑下游的湍流的早期过渡。底部流动的变化将具有强烈的三维特征，这使得这个问题超出了航空航天工业中常规使用的基于锥形流动假设的标准条带方法的能力。本文描述了一个全三维方法的应用程序，在一个机翼上的酒窝流类似于一个自然的层流机翼。求解三维可压缩边界层方程的底部流动和使用点到点的推进方案求解三维PSE方程，它表明，高波数的稳定横流模式可以变得不稳定，并迅速增长的凹坑尾流中的一个区域远远超出了前缘的稳定横流模式通常会衰减。
The formation of shallow dimples near the leading edge of natural laminar flow wings can occur during operation due to impact by hail, potentially changing the stability characteristics and causing an early transition to turbulence downstream of the dimple. Changes in the base flow will be strongly three-dimensional in character putting this problem beyond the capability of the standard strip based approaches founded on conical flow assumptions that are routinely used in the aerospace industry. This paper describes the application of a fully 3d method to a dimple on a wing for flow resembling that on a natural laminar flow wing. Solving the three-dimensional compressible boundary layer equations for the base flow and using a point to point marching scheme for solving the 3d PSE equations, it is shown that high wave-number stationary cross-flow modes can become unstable and grow rapidly in the dimple wake in a region well beyond the leading edge where stationary cross-flow modes would normally be decaying.
复杂机翼几何形状的稳定性分析：广义非正交坐标中的抛物化稳定性方程。
影响因子：
8
作者：
M. Mughal
通讯作者：
M. Mughal
影响因子：
8
作者：
M. Arthur
通讯作者：
M. Arthur
自动网格生成用于快速响应纳维-斯托克斯计算
影响因子：
8
作者：
M. Leatham;S. Stokes;J. Shaw;J. Cooper;J. Appa;T. Blaylock
通讯作者：
T. Blaylock