*
An exact, full-potential-equation model for the steady, irrotational,
homoentropic, and homoenergetic flow of a compressible, inviscid fluid
through a two-dimensional planar cascade together with its appropriate
boundary conditions has been derived. The CAS2D computer program
numerically solves an artificially time-dependent form of the actual
full-potential-equation, providing a nonrotating blade-to-blade, steady,
potential transonic cascade flow analysis code.*

*
In CAS2D, the governing equation is discretized by using type-dependent,
rotated finite differencing and the finite area technique. The flow field
is discretized by providing a boundary-fitted, nonuniform computational
mesh. This mesh is generated by using a sequence of conformal
mapping, nonorthogonal coordinate stretching, and local, isoparametric,
bilinear mapping functions. The discretized form of the full-potential
equation is solved iteratively by using successive line over relaxation.
Possible isentropic shocks are captured by the explicit addition of an
artificial viscosity in a conservative form. In addition, a four-level,
consecutive, mesh refinement feature makes CAS2D a reliable and fast
algorithm for the analysis of transonic, two-dimensional cascade flows.
The results from CAS2D are not directly applicable to three-dimensional,
potential, rotating flows through a cascade of blades because CAS2D does
not consider the effects of the Coriolis force that would be present in
the three-dimensional case.
( NASA Lewis Research Center )
*

This program was released by NASA through COSMIC as LEW-13854. The italicized text above is from the official NASA release.

- There are no references for this program.
- Download cas2d.zip, containing the original source code, the source code converted to modern Fortran, and a test program.