A reactive aftermarket automotive style muffler was considered for development and validation of a procedure to numerically predict and experimentally validate acoustic performance. A CAD model of the silencer was created and meshed. The silencer interior included two sections of perforated pipe, which were included in the cavity mesh. A hybrid FE-SEA (Statistical Energy Analysis) numerical model consisting of a finite element acoustic cavity excited by a diffuse acoustic field at the inlet and coupled via hybrid junctions to SEA semi-infinite fluids on both the inlet and outlet. The hybrid FE-SEA model solves very rapidly on a desktop PC making iterative numerical design a realistic option.To validate the predictions, an experimental setup was created to directly measure the muffler insertion loss. This was done by using a broadband acoustic source piped into a hemi-anechoic chamber. A straight pipe with simple bends to recreate the path from muffler inlet to outlet was fabricated for comparison. Muffler insertion loss was calculated by means of a simple level difference between the silencer and the straight pipe. Agreement between experimental measurement and numerical prediction are excellent. A simple procedure allowing high confidence numerical evaluation of design iterations based on CAD models is outlined.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Prediction of Muffler Insertion Loss by a Hybrid FE Acoustic-SEA Model


    Weitere Titelangaben:

    Sae International Journal of Passenger Cars. Mechanical Systems
    Sae Int. J. Passeng. Cars – Mech. Syst


    Beteiligte:
    Labyak, David (Autor:in) / Pruetz, Jeff (Autor:in) / Mattson, Steven G. (Autor:in) / Connelly, Terence (Autor:in)

    Kongress:

    SAE 2009 Noise and Vibration Conference and Exhibition ; 2009



    Erscheinungsdatum :

    2009-05-19


    Format / Umfang :

    7 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




    Development of a Muffler Insertion Loss Flow Rig

    Herrin, D. W. / Chen, Jonathan | SAE Technical Papers | 2019


    Development of a Muffler Insertion Loss Flow Rig

    Chen, Jonathan / Herrin, D. W. | British Library Conference Proceedings | 2019


    Prediction of Transmission Loss for Motorcycle Muffler

    Suwa, Jun-ichi / Yamamoto, Makoto / Oda, Mitsuaki et al. | SAE Technical Papers | 1999


    Prediction of transmission loss for motorcycle muffler

    Kaneda,T. / Oda,M. / Yamamoto,M. et al. | Kraftfahrwesen | 1999


    Acoustic Matching Simulation of Muffler with Hybrid Approach

    Zheng, Sifa / Lian, XiaoMin / Kang, ZhongXu | SAE Technical Papers | 2011