Structure of the reaction zone in a reacting mixing layer
Abstract
The vortex/transport element methods are used to compute the dynamics, mixing, and chemical reaction between two streams of fuel and oxidizer flowing at two different velocities. Two- and three-dimensional simulations are obtained for the nonreacting mixing layer to assess the accuracy of the numerics and to determine the range of validity of the 2D approximation. Solutions for the reacting mixing layer are obtained for different Damkoehler numbers and for the fast chemistry and finite-rate kinetics. Results indicate that at low Damkoehler numbers, the reaction occurs within the large eddies in a distributed reaction zone mode. At high Damkoehler numbers, the reaction occurs at the outer edges of the eddies in a thick reaction sheet mode. In both cases, the products are concentrated within the large eddies where the vorticity concentration is highest.
- Publication:
-
Dynamics of Deflagrations and Reactive Systems: Heterogeneous Combustion
- Pub Date:
- 1991
- Bibcode:
- 1991ddrs.coll..220G
- Keywords:
-
- Computerized Simulation;
- Damkohler Number;
- Mixing Layers (Fluids);
- Reacting Flow;
- Reaction Kinetics;
- Burning Rate;
- Chemical Reactions;
- Computational Fluid Dynamics;
- Shear Layers;
- Vorticity;
- Fluid Mechanics and Heat Transfer