Structural Sensitivity of the Finite-Amplitude Vortex Shedding Behind a Circular Cylinder
Structural Sensitivity of the Finite-Amplitude Vortex Shedding Behind a Circular Cylinder
复制标题
圆柱体后有限幅涡旋脱落的结构敏感性
DOI：
10.1007/978-1-4020-9898-7_12
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
J. Pralits
中科院分区：
文献类型：
--
作者：
P. Luchini;F. Giannetti;J. Pralits
In this paper we study the structural sensitivity of the nonlinear periodic oscillation arising in the wake of a circular cylinder forRe47. The sensibility of the periodic state to a spatially localised feedback from velocity to force is analysed by performing a structural stability analysis of the problem. The sensitivity of the vortex shedding frequency is analysed by evaluating the adjoint eigenvectors of the Floquet transition operator. The product of the resulting neutral mode with the nonlinear periodic state is then used to localise the instability core. The results obtained with this new approach are then compared with those derived by Giannetti & Luchini [8]. An excellent agreement is found comparing the present results with the experimental data of Strykowski & Sreenivasan [7].
