A simplified method to model perforated tubes in mufflers is the equivalent transfer impedance approach. Various empirical formulas that consider the porosity, hole diameter, wall thickness, and flow type have been proposed to date. They normally work very well under the conditions that the formulas are intended for. However, there are situations that the empirical formulas may not be able to cover. In this paper, we propose a simple BEM-based numerical procedure to determine the transfer impedance from a small perforate sample, and then send the transfer impedance to the muffler BEM model for analysis purposes. Numerical results are verified in three test cases.


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    Titel :

    Numerical Determination of Transfer Impedance for Perforates


    Weitere Titelangaben:

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


    Beteiligte:
    Li, J. (Autor:in) / Wang, P. (Autor:in) / Wu, T. W. (Autor:in)

    Kongress:

    SAE 2015 Noise and Vibration Conference and Exhibition ; 2015



    Erscheinungsdatum :

    15.06.2015


    Format / Umfang :

    6 pages




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :


    Numerical Determination of Transfer Impedance for Perforates

    Wang, P. / Li, J. / Wu, T. W. | British Library Conference Proceedings | 2015


    An improved impedance model for perforates including the effect of bias flow

    Betts, Juan / Follet, Jesse / Kelly, Jeffrey et al. | AIAA | 2001


    Evaluation of an impedance model for perforates including the effect of bias flow

    Betts, Juan / Follet, Jesse / Kelly, Jeffrey et al. | AIAA | 2000


    AN IMPROVED IMPEDANCE MODEL FOR PERFORATES INCLUDING THE EFFECT OF BIAS FLOW

    Betts, J. F. / Follet, J. I. / Kelly, J. et al. | British Library Conference Proceedings | 2001


    Experimental Investigation of Nonlinear Acoustic Properties for Perforates

    Bodén, Hans / Guo, Ying / Tözün, Hüseyin Bora | AIAA | 2006