Comparison of Single-Block and Multi-Block Grids around Wing-Fuselage Configurations

摘要

Computational procedures for the generation of single and multiblock grids by transfinite interpolation around wing-fuselage configurations are presented. The single-block grid is generated from an initial grid around the wing alone, adapted to conform to the fuselage by transfinite interpolation. One of the grid lines also conforms to the cut between the fuselage and the symmetry plane. The single-block grid contains highly skewed grid cells outside the fuselage, especially if the fuselage is exposed far from the wing. It is better to divide the flow region into several subregions, each a geometrically simple figure. The flow region around the wing-fuselage configuration is divided into three subregions. The multiblock grid is better than a single-block grid to generate nearly orthogonal grids and to condense grid points in regions where the dependent variables change rapidly.