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Acoustic Characteristics of Mufflers with an Extended Inlet and Outlet  

이준신 (한국전력공사 전력연구원 원자력연구실)
Publication Information
The Journal of the Acoustical Society of Korea / v.21, no.5, 2002 , pp. 503-509 More about this Journal
Abstract
Cylindrical chamber silencers with an extended inlet and outlet are extensively used in many application fields to reduce the propagated noise in ducts. The basic attenuation effectiveness in the low frequency region can be explained by the reactive wave action inside the expansion chamber associated with the geometric configurations of the inlet and outlet locations, and the area expansion of the jacket. In this study. an acoustic analysis is carried out for a concentric extended pipe inserted into a simple expansion chamber. An algebraic equation is derived by using the eigenfunction expansion and orthogonality principle in which the acoustic pressures and particle velocities defined on each subdivided surface are expressed by the separable coordinates. By using the proposed analytical method, transmission losses are predicted for several configurations of the concentric extended systems and they agree very well with experimental results.
Keywords
Silencer; Concentric type silencer; Acoustic analysis; Boundary mode method;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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