Major upgrades have been made in two of the programs reported in "Five Computer Codes for Analysis of Turbomachinery" (LEW-16851), NASA Tech Briefs, Vol. 23, No. 11 (November 1999), page 28. The affected programs are:

  • Swift - a code for three-dimensional (3D) multiblock analysis; and
  • TCGRID, which generates a 3D grid used with Swift.

Originally utilizing only a central-differencing scheme for numerical solution, Swift was augmented by addition of two upwind schemes that give greater accuracy but take more computing time. Other improvements in Swift include addition of a shear-stress-transport turbulence model for better prediction of adverse pressure gradients, addition of an H-grid capability for flexibility in modeling flows in pumps and ducts, and modification to enable simultaneous modeling of hub and tip clearances. Improvements in TCGRID include modifications to enable generation of grids for more complicated flow paths and addition of an option to generate grids compatible with the ADPAC code used at NASA and in industry. For both codes, new test cases were developed and documentation was updated. Both codes were converted to Fortran 90, with dynamic memory allocation. Both codes were also modified for ease of use in both UNIX and Windows operating systems.

These programs were written by Rodrick V. Chima and Meng-Sing Liou of Glenn Research Center. For further information, access the Technical Support Package (TSP) free on-line at under the Software category.

Inquiries concerning rights for the commercial use of this invention should be addressed to

NASA Glenn Research Center
Commercial Technology Office
Attn: Steve Fedor
Mail Stop 4-8
21000 Brookpark Road
Ohio 44135.

Refer to LEW-17635/88-1.

ORIGINAL URL - /Briefs/Oct05/LEW_17635.html

NASA Tech Briefs Magazine

This article first appeared in the October, 2005 issue of NASA Tech Briefs Magazine.

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