Recently developed 3-D computational models (SCRINT, PARCH, SCHAFT, CRAFT) which analyze high speed propulsive flowfield problems are described. All the models contain generalized thermochemical capabilities and advanced turbulence models, and all integrate the governing equations using implicit/strongly-conservative upwind and/or central difference numerics. The models differ with respect to discretization (finite-difference vs finite-volume), solution formulation (spatial marching parabolized Navier-Stokes (PNS), iterative PNS, time asymptotic full Navier-Stokes (FNS), and time accurate FNS), chemistry coupling (matrix-split/loosely-coupled vs large-matrix/strongly coupled), and geometric/boundary condition flexibility. The hierarchy of propulsive related problems analyzable by these models is described, with specific model formulations found to be most appropriate for specific classes of propulsive flows. Applications to both air-breathing (scramjet/gas-turbine) and rocket propulsive flowfields are described along with thoughts and experiences related to code validation, turbulence modeling, and the development of problem specific, user-friendly codes.
Advanced Computational Models for Analyzing High Speed Propulsive Flowfields
1990
37 pages
Report
Keine Angabe
Englisch
Jet & Gas Turbine Engines , Computer Software , Applications programs (Computers) , Computational fluid dynamics , Flow distribution , High speed , Mathematical models , Three dimensional models , Turbulence models , Aerothermochemistry , Finite difference theory , Finite volume method , Gas turbine engines , Navier-stokes equation , Spatial marching , Supersonic combustion ramjet engines
ADVANCED COMPUTATIONAL MODELS FOR ANALYZING HIGH SPEED PROPULSIVE FLOWFIELDS
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