Computational Aero-Acoustic Using High-order Finite-Difference Schemes

Wei Jun Zhu (Invited author), Wen Zhong Shen (Invited author), Jens Nørkær Sørensen (Invited author)

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    Abstract

    In this paper, a high-order technique to accurately predict flow-generated noise is introduced. The technique consists of solving the viscous incompressible flow equations and inviscid acoustic equations using a incompressible/compressible splitting technique. The incompressible flow equations are solved using the in-house flow solver EllipSys2D/3D which is a second-order finite volume code. The acoustic solution is found by solving the acoustic equations using high-order finite difference schemes. The incompressible flow equations and the acoustic equations are solved at the same time levels where the pressure and the velocities obtained from the incompressible equations form the input to the acoustic equations. To achieve low dissipation and dispersion errors, either Dispersion-Relation-Preserving (DRP) schemes or optimized compact finite difference schemes are used for spatial discretizations of the acoustic equations. The classical fourth-order Runge-Kutta time scheme is applied to the acoustic equations for time discretization.
    Original languageEnglish
    Book seriesJournal of Physics: Conference Series (Online)
    Volume75
    Pages (from-to)012084
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2007
    Event2nd International Conference on "The Science of Making Torque From Wind" - Kgs. Lyngby, Denmark
    Duration: 28 Aug 200731 Aug 2007
    Conference number: 2
    http://www.twind2007.mek.dtu.dk/

    Conference

    Conference2nd International Conference on "The Science of Making Torque From Wind"
    Number2
    Country/TerritoryDenmark
    CityKgs. Lyngby
    Period28/08/200731/08/2007
    Internet address

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