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    Numerical Simulations of Noise Induced by Flow in HVAC Ventilation Ducts

    Numerical Simulations of Noise Induced by Flow in HVAC Ventilation Ducts


    Numerical simulations are performed to investigate noise generated by flow in automotive HVAC ducts. A hybrid computational method for analyzing flow noise is applied: Large Eddy Simulation (LES) for predicting flow fields and Multi-domain boundary element method for predicting acoustic propagation. LES gives time-resolved solutions of flow velocity and pressure fields. By applying the acoustic analogy theory, the unsteady flow parameters are translated into sound source in evaluating the acoustic propagation. The computational result shows the noise caused by the HVAC ducts is strong. The noise is of broadband with a peak value at 370Hz. A major contribution of the noise generation is from the center ducts. Two design modifications of the center ducts are explored to regulate the flow structures with the ducts for reducing noise generation. Test results demonstrate the effectiveness of the modifications.

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    Titel :

    Numerical Simulations of Noise Induced by Flow in HVAC Ventilation Ducts

    Weitere Titelangaben:

    Sae Int. J. Mater. Manuf
    Sae International Journal of Materials and Manufacturing

    Beteiligte:
    Chen, Jun (Autor:in) / Wang, Yiping (Autor:in) / Gu, Zhengqi (Autor:in)
    Kongress:

    SAE 2011 World Congress & Exhibition ; 2011

    Erschienen in:

    Sae International Journal of Materials and Manufacturing ; 4 , 1 ; 696-707

    Erscheinungsdatum :

    2011-04-12

    Format / Umfang :

    12 pages

    ISSN :

    1946-3987 , 1946-3979

    DOI :

    https://doi.org/10.4271/2011-01-0505

    Medientyp :

    Aufsatz (Konferenz)

    Format :

    Print

    Sprache :

    Englisch

    Schlagwörter :

    Pressure , Simulation and modeling , Acoustics , Noise , Heating, ventilation, and air conditioning systems (HVAC)

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