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Numerical and experimental analysis of dissipative silencer coupled with quarter wave tube
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Date
2013
Author
Dinçer, Ayşe
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The study deals with investigation of acoustical characteristics of a hybrid silencer made up of a dissipative silencer and a quarter wave tube resonator. The theoretical and experimental analyses are performed to define acoustic characteristics of a simple expansion chamber and reactive perforated silencer, while the numerical and experimental solutions are presented for dissipative perforated silencer. Furthermore, the experiments and numerical solutions are extended to the hybrid silencer to find the effect of quarter wave tube resonator on the silencer performance. The experimental results of dissipative silencer are verified with theoretical solutions. The empirical expressions for acoustic impedance of perforation and filling material are presented in this study for use in a three-dimensional boundary element method (BEM). Besides, an experimental setup is also established to find the characteristic impedance and wavenumber of absorbing material to import BEM solution when the empirical expression cannot be used. The results found with BEM are compared by analytical and experimental results favorably.
Subject Keywords
Dissipative silencer.
,
Sound-waves.
,
Acoustic surface waves.
,
Boundary element methods.
URI
http://etd.lib.metu.edu.tr/upload/12615527/index.pdf
https://hdl.handle.net/11511/22388
Collections
Graduate School of Natural and Applied Sciences, Thesis
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A. Dinçer, “Numerical and experimental analysis of dissipative silencer coupled with quarter wave tube,” M.S. - Master of Science, Middle East Technical University, 2013.
