Numerical prediction of flow characteristics of confined turbulent premixed flame
Abstract
A twodimensional numerical model is developed to predict the transverse velocity, the concentrations of reactants and CO2, and the reaction rate of confined turbulent premixed flames. The model is applied to a CH4air mixture at 600 K which is ignited and yields burnt products entering the combustion chamber at 2000 K at twice the velocity of the stream around them. The two streams mix in a test section. Partial differential equations are defined for the mean velocity, fuel mass fraction, O2 mass fraction, products mass fraction, the conserved properties, the enthalpy, etc. Finite difference equations are used to discretize the flow and the partial differential equations are integrated over the control volume. An eddy breakup model is configured for the reaction rate in the reaction zone of turbulent flames. The predicted and observed velocity fields were found to match well, while discrepancies were present in the concentration field.
 Publication:

Numerical Methods in Laminar and Turbulent Flow
 Pub Date:
 1983
 Bibcode:
 1983nmlt.proc.1106D
 Keywords:

 Computational Fluid Dynamics;
 Flame Stability;
 Flow Characteristics;
 Prediction Analysis Techniques;
 Premixed Flames;
 Turbulent Flow;
 Flame Propagation;
 High Temperature Gases;
 Mixing Length Flow Theory;
 Two Dimensional Models;
 Fluid Mechanics and Heat Transfer