Numerical simulation of the acoustic processes in an impedance tube at high levels of acoustic pressure is a way to solve a problem of noise suppressing by liners. These studies used liner specimen that is one cylindrical Helmholtz resonator. The evaluation of the real and imaginary parts of the liner acoustic impedance and sound absorption coefficient was performed for sound pressure levels of 130, 140 and 150 dB. The numerical simulation used experimental data having been obtained on the impedance tube with normal incidence waves. At the first stage of the numerical simulation it was used the linearized Navier-Stokes equations, which describe well the imaginary part of the liner impedance whatever the sound pressure level. These equations were solved by finite element method in COMSOL Multiphysics program in axisymmetric formulation. At the second stage, the complete Navier-Stokes equations were solved by direct numerical simulation in ANSYS CFX in axisymmetric formulation. As the result, the acceptable agreement between numerical simulation and experiment was obtained.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Numerical simulation of the processes in the normal incidence tube for high acoustic pressure levels


    Contributors:

    Conference:

    INTERNATIONAL CONFERENCE ON THE METHODS OF AEROPHYSICAL RESEARCH (ICMAR 2016): Proceedings of the 18th International Conference on the Methods of Aerophysical Research ; 2016 ; Perm, Russia


    Published in:

    Publication date :

    2016-10-13


    Size :

    6 pages





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



    Digital PIV Measurements of Acoustic Particle Displacements in a Normal Incidence Impedance Tube

    Humphreys, W. M. / Bartram, S. M. / Parrott, T. L. et al. | British Library Conference Proceedings | 1998


    Digital PIV measurements of acoustic particle displacements in a normal incidence impedance tube

    Humphreys, Jr., William / Bartram, Scott / Parrott, Tony et al. | AIAA | 1998




    Comparison of acoustic characteristics of resonant liner samples at normal incidence of waves based on semiempirical model, natural experiment and numerical simulation

    Kustov, O. Yu. / Khramtsov, I. V. / Palchikovskiy, V. V. et al. | American Institute of Physics | 2021

    Free access