A simple model has been developed for the prediction of soot volume fractions in a laminar diffusion flame. Measurements and computations of a counterftow flame have been used to evaluate the correlation between soot surface growth rates and the mixture fraction or fuel atom mass fraction. An averag
A soot formation rate map for a laminar ethylene diffusion flame
โ Scribed by J.H. Kent; D.R. Honnery
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 662 KB
- Volume
- 79
- Category
- Article
- ISSN
- 0010-2180
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โฆ Synopsis
Measured soot volume fraction profiles are combined with the modeled temperatures, velocities, and mixture fractions in an axisymmetric laminar diffusion flame to derive local soot formation rates. The flame is modeled by solving transport equations for momentum, mixture fraction, and enthalpy together with a radiation model. The measured soot concentration profiles are differentiated along the computed particle trajectories. The soot formation rates are correlated with local mixture fraction and temperature. Although the range of mixture fraction-temperature combinations available in this flame is not complete, the map provides quantitative information in the principal sootproducing region.
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Detailed modeling of soot particle nucleation, growth and oxidation in laminar premixed ethylene-air flames at a pressure of 10 bar is presented. The employed kinetic model of soot formation, developed and tested earlier for subatmospheric and atmospheric flames, can quantitatively describe the expe
A simplified model of soot formation, based on a laminar flamelet approach and developed, in earlier studies, with a view to subsequent turbulent flame prediction, is extended to include oxidation. The model is evaluated against detailed measurements in a two-dimensional laminar diffusion flame on a
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