Compressional acoustic waves in structure “Piezocylinder - viscoelastic layer - liquid”

Author

Teplykh, Andrei ; Zaitsev, Boris ; Kuznetsova, Iren

Author_Institution

Saratov Branch, Inst. of Radio Eng. & Electron. of RAS, Saratov, Russia

fYear

2013

fDate

21-25 July 2013

Firstpage

1049

Lastpage

1052

Abstract

In this paper the characteristics (phase velocity and attenuation coefficient) of compressional acoustic waves propagated in piezoelectric cylinder covered by viscoelastic polymeric layer and immersed into viscous fluid are investigated. It is well known that propagation of such waves can be accompanied by radiation of bulk acoustic wave into liquid contacting with the waveguide. This happens in the case if the phase velocity of the wave in the corresponding structure exceeds the speed of sound in the liquid. Due to this, the attenuation of corresponding waves caused by two reasons: it is the viscosity of the liquid and radiation losses. Our calculations allow us to estimate the contribution of each of these mechanisms into the overall attenuation.

Keywords

acoustic wave absorption; acoustic wave propagation; acoustic wave velocity; polymers; viscosity; bulk acoustic wave radiation; compressional acoustic waves; liquid viscosity; overall attenuation; piezocylinder-viscoelastic layer-liquid structure; piezoelectric cylinder; radiation losses; sound speed; viscoelastic polymeric layer; viscous fluid; wave attenuation; wave phase velocity; wave propagation; waveguide; Acoustic waves; Attenuation; Equations; Liquid waveguides; Liquids; compressional acoustic wave; piezocylinder; radiation losses; viscoelastic matching layer;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium (IUS), 2013 IEEE International

Conference_Location

Prague

ISSN

1948-5719

Print_ISBN

978-1-4673-5684-8

Type

conf

DOI

10.1109/ULTSYM.2013.0269

Filename

6725282