A tetrahedral mesh generation method for acquiring accurate sonic boom pressure signatures several body lengths from an aircraft model has been developed. The method serves as a tool for aerodynamicists to efficiently create useful meshes for sonic boom analysis. The procedure includes generating a refined near-field grid with a cylindrically shaped boundary that encompasses the model just beyond its surface and a prismatic mesh from the cylindrical boundary to the far field. Projecting the boundary in the radial direction and forming prisms between neighboring layer faces creates the prism mesh. Each prism is subdivided into three tetrahedra resulting in a mesh comprised entirely of tetrahedral cells. The prism structure permits radial stretching and mesh alignment with the Mach cone around the aircraft model for accurate on- and offtrack signatures. Computational results for four models compared with experimental data validate this methodology.


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    Title :

    Refined Tetrahedral Meshes with Mach Cone Aligned Prisms for Sonic Boom Analysis


    Contributors:

    Published in:

    Journal of Aircraft ; 50 , 3 ; 778-790


    Publication date :

    2013-05-01




    Type of media :

    Conference paper , Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English






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