Modeling and Applications of Straight-Through Reactive Mufflers

直通式反應型消音器傳輸損失之探討

羅浩(H. Luo) ； 陳義男(Y. N. Chen)

《中華民國振動與噪音工程學會論文集》 1993 (1993/06) Pp. 83-94

https://doi.org/10.30028/CSSVANNUAL.199306.0083

摘要

本文以線性聲學阻抗之假設，運用一維之平面波聲學理論，首度推展槽孔延伸管消音器之傳輸損失分析解，並於無流速之情況下，經由分析及實驗量測值之相互比對，証實本分析法可有效地預測其消音。本文探討所獲得之結論，可實際應用於車輛消音器之設計，對通式反應型消音器聲學元件之選用及組配上提供相當大之幫助。

並列摘要

In this work, a newly developed approach is first presented for modeling perforated muffler components such as partially perforated extended inlet/outlet elements. After having evaluated the transfer matrices of all sub-elements, the transfer matrices of partially perforated extended inlet/outlet elements can be found from the product of these transfer matrices. For acoustic impedance in the linear regime a closed form solution of the partially perforated intruding tube muffler transmission loss was first obtained. In the case of zero mean flow, the predicted results for various muffler configurations show very good agreement with the experiments. By tuning the lengths and associated physical parameters to the in-situ case of various tubular elements one can achieve rapid and economical modeling these that are frequently used in commercial reactive mufflers as well as in mary other industrial applications. This modeling ability is very useful to a muffler designer especially in the preliminary design stage.

並列關鍵字

straight-through muffler ； transfer matrix ； transmission loss