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Effects of time scale ratio in turbulent diffusion flames modelling
An enhanced modelling technique is developed for the prediction of turbulent diffusion flames. The species transport and mixing mechanism is considered to be governed by its own scales. The scalar turbulence closure problem is solved using a two-equation scalar turbulence model based on the variance of the mixture fraction and its rate of dissipation. This eliminates the need for the questionable analogy concept and its subsequent constant time scale ratio assumption. The full modelling procedure is described: combustion modelling, turbulence closure and radiation modelling. A brief description of the numerical techniques is given. The method is applied to the calculation of the 3D glass furnace model and shows promising features. More realistic levels of concentrations are predicted. Comparison with experimental results shows good agreement.
Effects of time scale ratio in turbulent diffusion flames modelling
An enhanced modelling technique is developed for the prediction of turbulent diffusion flames. The species transport and mixing mechanism is considered to be governed by its own scales. The scalar turbulence closure problem is solved using a two-equation scalar turbulence model based on the variance of the mixture fraction and its rate of dissipation. This eliminates the need for the questionable analogy concept and its subsequent constant time scale ratio assumption. The full modelling procedure is described: combustion modelling, turbulence closure and radiation modelling. A brief description of the numerical techniques is given. The method is applied to the calculation of the 3D glass furnace model and shows promising features. More realistic levels of concentrations are predicted. Comparison with experimental results shows good agreement.
Effects of time scale ratio in turbulent diffusion flames modelling
Auswirkungen des Zeitskalenverhältnisses bei der Modellierung von turbulenten Diffusionsflammen
El Hayek, M. (author) / Henriette, J. (author) / Meer, T.H. van der (author)
1996
8 Seiten, 9 Bilder, 4 Tabellen, 27 Quellen
Article (Journal)
English
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