Modelling of turbulent diffusion flames stabilized on a bluff body
Abstract
The present authors previously proposed a modification of the k-epsilon turbulence model in the modeling of jet diffusion flames to represent the so-called laminarization phenomenon, caused by combustion in the low-turbulence region, and recently found, in experiments on diffusion flames stabilized on a bluff body, that this phenomenon also exerts an important influence on the structure of these flames with recirculation zone. In the present study, the above modified k-epsilon model was applied to the modeling of this bluff-body diffusion flame in order to examine applicability of the modification and the ability of the k-epsilon model to represent such a complex flow field. As a result of comparison of the calculated results to experimental ones, it was found that the consideration of the laminarization phenomenon enables the k-epsilon model to provide predictions of encouraging quality, though their quantitative discrepancies are still discernible.
- Publication:
-
JSME Transactions
- Pub Date:
- August 1992
- Bibcode:
- 1992JSMET..58.2577L
- Keywords:
-
- Bluff Bodies;
- Combustible Flow;
- Diffusion Flames;
- Flame Stability;
- Turbulent Flow;
- Flow Distribution;
- K-Epsilon Turbulence Model;
- Laminar Flow;
- Recirculative Fluid Flow;
- Fluid Mechanics and Heat Transfer