Numerical Grid Generation Around Complete Aircraft Configurations,
DORNIER G M B H FRIEDRICHSHAFEN GERMANY (F R) THEORETICAL AERODYNAMIC GROUP
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A method for accurately generating boundary conforming, three-dimensional computational grids applicable to realistic aircraft configurations is presented. Configurations with an arbitrarily shaped and positioned wing, a horizontal tail or canard and a vertical tail attached to an arbitrarily shaped fuselage can be treated. The grid generation technique divides the computational domain into multiple rectangular blocks whose structure follow the natural lines of the configuration. For each of these contigous sub-regions the grids are generated separately and then patched together to cover the entire physical region. The grids for the sub-regions are generated by the solution of elliptical partial differential equations PDE. The method is an automated procedure but with interactive control and optimization possibilities which enable the user to produce coordinate lines with sufficient continuity across the block boundaries. Due to the block structure and the data organization of the method very fine grids up to several millions of grid points for complete aircraft configurations can be generated.