A survey of upwind methods for flows with equilibrium and non-equilibrium chemistry and thermodynamicsSeveral versions of flux-vector split and flux-difference split algorithms were compared with regard to general applicability and complexity. Test computations were performed using curve-fit equilibrium air chemistry for an M = 5 high-temperature inviscid flow over a wedge, and an M = 24.5 inviscid flow over a blunt cylinder for test computations; for these cases, little difference in accuracy was found among the versions of the same flux-split algorithm. For flows with nonequilibrium chemistry, the effects of the thermodynamic model on the development of flux-vector split and flux-difference split algorithms were investigated using an equilibrium model, a general nonequilibrium model, and a simplified model based on vibrational relaxation. Several numerical examples are presented, including nonequilibrium air chemistry in a high-temperature shock tube and nonequilibrium hydrogen-air chemistry in a supersonic diffuser.
Document ID
19890055808
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Grossman, B. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Garrett, J. (United Technologies Corp. Pratt and Whitney Group, West Palm Beach, FL, United States)
Cinnella, P. (Virginia Polytechnic Inst. and State Univ. Blacksburg, VA, United States)