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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110

Выпуски:
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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v31.i5.70
pages 500-508

Expansion Chamber as an Efficient Tool for Changing Waveguide Sound Transmittance

I. Yu. Goncharova
Institute of Hydromechanics of National Academy of Sciences of Ukraine, Kyiv, Ukraine

Краткое описание

The author has developed a mathematical model and solved a problem of sound propagation in a circular waveguide with circular concentric expansion chamber. It is found out that when sound propagates in the waveguide with an expansion chamber the frequency zones appear, for which a considerable decrease of sound transmittance of the system is observed. Influence of the expansion chamber dimensions on changes of the sound transmittance of the waveguide is investigated. It is ascertained that variation of the expansion chamber cross-section area mainly influences the waveguide cut-off zones positions on the frequency axis. The expansion chamber length influences basically the width of the waveguide cut-off zones. The ways of optimization of geometrical parameters for considered system are determined.