Some reacting-flow validation results for USA-series codes

The USA-series of CFD codes are based on Unified Solution Algorithms including explicit and implicit formulations, factorization and relaxation approaches, time marching and space marching methodologies, etc, in order to be able to solve a very wide class of CFD problems using a single framework. Euler or Navier-Stokes equations are solved using a finite-volume treatment with upwind Total Variation Diminishing discretization for the inviscid terms. Perfect gas and real gas options are available including equilibrium and nonequilibrium chemistry. In this paper three sets of validations are provided: (1) numerical solutions are presented showing the full range of possible solutions to detonation wave problems; (2) comparison between the solution obtained by the USA code and GKAP is shown for supersonic combustion in a duct; (3) simulation of combustion in a supersonic shear layer is shown to have reasonable agreement with experimental observations.