Title :
Sound propagation in thin-walled elastic pipe with viscous liquid-bubble mixture and deformable central rod
Author :
Bergman, Rudolf ; Levitsky, Semyon ; Haddad, Jehuda
Author_Institution :
Sami Shamoon Coll. of Eng., Beer-Sheva, Israel
Abstract :
Sound propagation in coaxial waveguide with bubbly liquid is investigated. It is assumed that the central part of the pipe is occupied by circular elastic rod, the tube wall can be treated as a thin elastic shell, and the liquid is pure viscous. Volume concentration of free gas is supposed to be small. The goal of the study is to estimate theoretically acoustic properties of such waveguide for different gas concentrations, bubble sizes, liquid viscosities and gap width. Results of analysis illustrate strong influence of liquid, gas, elastic shell and rod parameters on sound dispersion and attenuation.
Keywords :
acoustic wave absorption; acoustic wave propagation; acoustic waveguides; bubbles; elasticity; pipe flow; rods (structures); two-phase flow; bubble size; bubbly liquid; circular elastic central rod; coaxial waveguide sound propagation; deformable central rod; free gas volume concentration; gap width; gas concentration; liquid viscosity; sound attenuation; sound dispersion; thin elastic shell; thin walled elastic pipe sound propagation; viscous liquid-bubble mixture; waveguide acoustic properties; Acoustic propagation; Acoustic waveguides; Acoustic waves; Coaxial components; Estimation theory; Liquid waveguides; Thin wall structures; Viscosity; Waveguide discontinuities; Waveguide theory; circular gap; elastic waveguide; gas bubbles; sound propagation; viscous liquid;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5442029
