Destabilization of the Karman vortex street by frequency-modulated excitation

descriptionPublicationkeyboard_double_arrow_right Article 01 May 1991 English Publisher:AIP PublishingJournal:Physics of Fluids A: Fluid Dynamics, volume 3, pages 723-725 (issn: 0899-8213,

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Authors: M. Nakano; D. Rockwell;

doi: 10.1063/1.858004

Destabilization of the Karman vortex street by frequency-modulated excitation

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Abstract

A two-dimensional cylinder is subjected to frequency-modulated excitation in the cross-stream direction. Transition from a locked-in response to a completely destabilized response can be attained by lowering the value of modulation frequency while all other parameters are maintained constant. This transition involves progression through a series of identifiable states including lock-in at the modulation frequency, period doubling at the modulation frequency, and spectral-broadened response.

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