Accession Number:

ADA128491

Title:

Grid Generation About a Fin-Cylinder Combination.

Descriptive Note:

Technical memo.,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s):

Report Date:

1983-03-30

Pagination or Media Count:

57.0

Abstract:

An algebraic grid generation procedure is presented which produces a three-dimensional, body fitted coordinate system about a right circular cylinder with four symmetric fins attached. Special features of the grid are an initial value plane normal to the cylinder axis and the ability to cluster lines near the fin and cylinder surfaces for viscousturbulent flow calculations. The method used is a modification of the Jameson-Caughey procedure developed originally for inviscid transonic flow calculations about wing-fuselage combinations. In this procedure, a sequence of conformal transformations followed by a shearing transformation is used to map the irregular flow domain in physical space into a rectangular shaped computational domain. A three-dimensional grid is produced by stacking two-dimensional mappings. The method is therefore extremely fast. The main features of the procedure are discussed and two numerical examples of grids are presented for a fin composed of a symmetric Joukowsky airfoil. Author

Subject Categories:

  • Theoretical Mathematics
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE