R2D2 - A Fortran Program for Two-Dimensional Chemically Reacting, Hyperthermal, Internal Flows. Volume I. Method of Analysis

摘要

The theoretical formulation and method of analysis employed in the development of the Fortran Program R2D2 is described. The program is capable of solving the two dimensional (planar or axisymmetric) internal flow of a chemically reacting and/or vibrationally excited mixture of gases in a nonequilibrium or equilibrated state. The local Mach number at the entrance and exit stations of the duct may be either subsonic or supersonic, although an arc-driven expanding flow, consisting of a subsonic reservoir, a transonic throat, and a supersonic expansion, is presumed to be the configuration of primary interest. Discontinuites in wall slope are admissible. The axisymmetric formulation includes a swirl component of velocity, in addition to the axial and radial components, which may be significant in swirl-stabilized arc facilities. The current version of R2D2 incorporates a thermochemical data package for an 8 species, 10 chemical reaction model of high temperature air, including ionization and vibrational excitation. However, the number of species and reactions is only limited by considerations of computer storage and running time, which can be formidable.