Aeroacoustic simulations are extremely sensitive to numerical errors. To achieve a high order of accuracy, optimized finite difference schemes, such as the well-known dispersion-relation-preservation schemes, and multiblock structured meshes are often used. Challenges appear in communicating the flow information near grid discontinuities between neighboring blocks, and sophisticated interface treatments are required. The characteristic interface condition has been successful in applications in previous publications, and yet limitations exist that are identified in the present study. This paper proposes a new interface treatment based on the analogy between finite difference and finite volume discretizations. One-sided finite difference schemes are used to calculate the spatial derivatives in the normal direction, and the residuals are reconstructed from a finite volume perspective. Applications to several benchmark cases show an encouraging improvement as compared to the previous characteristic interface treatments. Presented as Paper 2013-2216 at the 19th AIAA/CEAS Aeroacoustics Conference (34th AIAA Aeroacoustics Conference), Berlin, Germany, 27-29 May 2013


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    Titel :

    Improved Block Interface Conditions for Aeroacoustic Problems with Grid Discontinuities


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik / 55.60 / 50.93 / 55.50 / 50.93 Weltraumforschung
    Lokalklassifikation TIB:    770/7040