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Modified Mode Matching Technique for Analyzing Simple Expansion Chamber with Arbitrary Inlet/Outlet Location
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 Title & Authors
Modified Mode Matching Technique for Analyzing Simple Expansion Chamber with Arbitrary Inlet/Outlet Location
Kim, Bong-Jun; Jeong, Ui-Bong; Lee, Jeong-Hwan;
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 Abstract
The acoustic property of reactive type single expansion chamber can be analyzed by traditional plane wave theory. This theory can be applied in low frequency range and has good performance. But this theory can't include higher order modes, therefore another method is essential to analyze acoustic filter in high frequency range. Many researcher suggested the method that can concern higher order modes, and their methods are using mode matching technique. But there is no method that can be applied to the analysis of single expansion chamber with arbitrary inlet/outlet duct position and numbers of higher order modes of inlet/outlet duct and middle chamber. In this paper, the method which can analyze single expansion chamber with arbitrary inlet/outlet duct position and numbers of higher order modes of inlet/outlet duct and middle chamber using fundamental mode matching technique, was suggested and the predictions by this method was compared with those by the finite element method, and the influence of inlet/outlet location to acoustic performance of single expansion chamber is investigated and explained by higher order mode effects
 Keywords
Simple Expansion Chamber Muffler;Four-Pole Parameter;Higher Order Modes;Mode Matching Technique;Transmission Loss;
 Language
Korean
 Cited by
1.
원형 단순 확장소음기의 성능향상을 위한 입.출구 위치의 최적설계,안세진;김봉준;정의봉;

대한기계학회논문집A, 2000. vol.24. 10, pp.2487-2495 crossref(new window)
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