A theoretical approach for analyzing the restabilization of wakes
A theoretical approach for analyzing the restabilization of wakes
复制标题
分析尾流再稳定的理论方法
DOI：
10.2514/6.1992-67
复制
发表时间：
1992
期刊：
影响因子：
2.5
通讯作者：
Ames D. C. Hill
中科院分区：
文献类型：
--
作者：
Ames D. C. Hill
线性稳定性分析为分析指定变化对钝体尾流的整体稳定性特性的影响提供了基础。该分析特别适用于将小圆柱体放置在大圆柱体后面以抑制涡街的问题。提出了系统临界雷诺数随第二个气缸相对于第一个气缸的位置而变化的预测，并显示与实验结果相比较。还考虑了对脱落频率的影响。该方法依赖于伴随特征值问题和非齐次伴随边值问题的求解。这些伴随解决方案被证明是分析各种尾流控制策略的关键组成部分。
A linear stability analysis provides the basis for an analysis of the effects of prescribed changes upon the global stability characteristics of a bluff body wake. The analysis is applied in particular to the problem of placing a small cylinder in the wake of a larger one in order to suppress the vortex street. A prediction of the alteration in the critical Reynolds number of the system as a function of the location of the second cylinder relative to the first is presented and is shown to compare favorably with experimental results. The effect upon shedding frequency is also considered. The approach relies on the solution of an adjoint eigenvalue problem and an inhomogeneous adjoint boundary value problem. These adjoint solutions are shown to be a key component in the analysis of a variety of wake control strategies.