A combination conformal-transfinite mapping method for grids about fin-afterbody combinations

摘要

An algebraic procedure is presented for the generation of a smooth computational grid about an afterbody-fin configuration. The method makes use of a sequence of conformal transformations to unwrap the geometry and remove the corner singularities at the fin trailing edge and tail of the afterbody. A 3-D grid is generated by stacking a sequence of 2-D grids of the C type on predetermined, smooth tubular surfaces. Clustering is accomplished by a sequence of one-dimensional stretching functions in physical space. Examples are presented to show the character of the resulting grid.