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Influence of gases on Lamb waves propagations in resonator

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3 Author(s)
Lianqun Zhou ; Changchun Institute of Optics, Fine Mechanics, and Physics, Chinese Academy of Sciences, Changchun 130033, People''s Republic of China; Graduate School of Chinese Academy of Sciences, Beijing 100039, People''s Republic of China; and Department of MN2S, FEMTO-ST Institute, CNRS, Université de Franche-Comté, 25044 Besançon, France ; Manceau, J.-F. ; Bastien, F.

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3268785 

We investigate gases effects on the Lamb wave resonant modes. Various frequency ranges are studied for the antisymmetric mode considering wave velocities either higher or lower than the gas sound velocity. We observe that the relative frequency shifts in the low frequency range of the antisymmetric mode is rather important; in the high frequency range of this mode, the quality factor decreases quickly when the Lamb wave phase velocity approaches the gas sound velocity. We find a good agreement between calculations and experiments in air and helium. The results suggest the possibility to get aerodynamics parameters of gas flow.

Published in:

Applied Physics Letters  (Volume:95 ,  Issue: 22 )

Date of Publication:

Nov 2009

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