Computation of turbulent reacting flows: Comparison of various mixing/chemistry interaction models
Abstract
This report compares various mixing/chemistry interaction models for turbulent combustion. Four different models are considered, three of which were developed previously: (1) chemical equilibrium model; (2) finite rate chemistry model using mean values; and (3) probability density function (PDF) approach with infinite rate chemistry. The fourth method is called the contact index model, in which the turbulent chemistry correlations are modeled by PDF and then solved in the finite rate chemistry formulation of model (2). The chemistry correlations result from Reynolds decomposing the thermochemical equations and can be combined into a contact index for each reaction. All of these combustion models are fully coupled to existing two dimensional hydrodynamic codes, including steady and unsteady full NavierStokes equations and boundary layer equations. Results are compared to experiment for various types of reacting flows.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 September 1983
 Bibcode:
 1983STIN...8413514W
 Keywords:

 Boundary Layers;
 Chemical Reactions;
 Combustion;
 Hydrodynamics;
 Mixing;
 Turbulence Models;
 Turbulent Flow;
 Boundary Layer Equations;
 Chemical Equilibrium;
 Cost Estimates;
 Mathematical Models;
 Methane;
 NavierStokes Equation;
 Fluid Mechanics and Heat Transfer