Some observations on turbulent mixing with chemical reactions
Abstract
Recent advances in the prediction of turbulent chemically reacting flows are reviewed, with emphasis on the detailed prediction of reacting jet flows coupling models of the turbulent mixing process with a detailed finite-rate kinetics scheme. Various turbulence model predictions of reacting hydrogen air jet are presented. An efficient kinetics calculation for a hydrocarbon system using the quasi-global concept is discussed and results obtained with an advanced quasi-global model for the higher hydrocarbons, including a detailed description of methane reactions are described. The outlook for further developments in the calculation of reacting flow fields is considered, including the application of the quasi-global model to fuel-rich mixtures and the incorporation of the effects of particles and droplets into the finite-rate scheme. Problems of Reynolds averaging in a reacting turbulent flow are described, and the Favre-averaging approach is considered. A comparison of calculations of a simple flow field using 'laminar' and 'turbulent' kinetics is presented.
- Publication:
-
AIAA, Aerospace Sciences Meeting
- Pub Date:
- January 1977
- Bibcode:
- 1977aiaa.meet.....E
- Keywords:
-
- Air Jets;
- Chemical Reactions;
- Combustible Flow;
- Hydrocarbon Fuels;
- Jet Flow;
- Reaction Kinetics;
- Turbulent Mixing;
- Flow Distribution;
- Mathematical Models;
- Methane;
- Performance Prediction;
- Turbulence Models;
- Fluid Mechanics and Heat Transfer