Application of the diffusional combustion model to the calculation of supersonic turbulent reacting jets
The authors consider a supersonic axisymmetric turbulent hydrogen jet in a cotraveling supersonic flow of heat air in their model depicting the influence of turbulence on the occurrence of chemical reactions. The model uses a modification of the probability-density functional: the method of a conservative scalar quantity. Finite difference calculations are employed to solve a system of simplified Navier-Stokes equations. All variables are Favre-averaged. For the calculation of a cotraveling diffusional hydrogen flame the model provides a good description at low velocities. At supersonic velocities, however, the diffusional-combustion approximation yields large inaccuracies in determining the concentrations of the reactants, and the finite rates of the chemical reactions must be taken into account to accurately describe the combustion of preliminarily unmixed reagents.
- OSTI ID:
- 6908423
- Journal Information:
- Combust., Explos. Shock Waves (Engl. Transl.); (United States), Journal Name: Combust., Explos. Shock Waves (Engl. Transl.); (United States) Vol. 23:3; ISSN CESWA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION KINETICS
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
DIFFUSION
ELEMENTS
EQUATIONS
FINITE DIFFERENCE METHOD
FLAME PROPAGATION
FLAMES
FLOW MODELS
FLOW RATE
FLUID FLOW
FLUIDS
GASES
HYDROGEN
ITERATIVE METHODS
JETS
KINETICS
LAMINAR FLOW
MATHEMATICAL MODELS
NAVIER-STOKES EQUATIONS
NONMETALS
NUMERICAL SOLUTION
OXIDATION
PARTIAL DIFFERENTIAL EQUATIONS
REACTION KINETICS
SIMULATION
SUPERSONIC FLOW
THERMOCHEMICAL PROCESSES
TURBULENT FLOW