The ratio of the sound pressure level at the exit to that at the entrance is minimized for an annular straight lined duct of finite length carrying a uniform gas flow. The idea is to compute numerically this ratio for a large number of combinations of the values of the liner parameters (inertance, resistance, stiffness) and establish a formula for the dependence of the ratio on these parameters. By using this formula the minimum value of the ratio, as well the values of parameters for which the minimum is obtained, are found numerically.


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    Title :

    The sound attenuation coefficient optimization for an annular straight lined duct of finite length


    Contributors:

    Conference:

    10TH INTERNATIONAL CONFERENCE ON MATHEMATICAL PROBLEMS IN ENGINEERING, AEROSPACE AND SCIENCES: ICNPAA 2014 ; 2014 ; Narvik, Norway


    Published in:

    AIP Conference Proceedings ; 1637 , 1 ; 1083-1091


    Publication date :

    2014-12-10


    Size :

    9 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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