Fluttering flags: An experimental study of fluid forces

Abstract : Unsteady fluid forces are measured at the onset of flutter and during the post-critical flutter of flags placed in a wind tunnel, focusing on the drag force and the moment around the flagpole. The evolution of these forces during flutter mode switches, induced by varying either the mass ratio or the wind velocity, is discussed by using additional highspeed imaging. For the highest wind velocities, losses of periodicity and snapping events are reported. Time-averaged and unsteady drag coefficients are reported and compared to previous works. (C) 2013 Elsevier Ltd. All rights reserved.
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Soumis le : vendredi 23 mai 2014 - 13:59:21
Dernière modification le : jeudi 13 septembre 2018 - 15:24:13

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Emmanuel Virot, Xavier Amandolese, Pascal Hemon. Fluttering flags: An experimental study of fluid forces. Journal of Fluids and Structures, Elsevier, 2013, 43, pp.385-401. 〈10.1016/j.jfluidstructs.2013.09.012〉. 〈hal-00995149〉

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