Modeling soot formation in turbulent kerosene/air jet diffusion flames |
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Authors: | Z Wen MJ Thomson MF Lightstone |
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Affiliation: | a Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, Toronto, Ontario, Canada M5S 3G8 b Department of Mechanical Engineering, McMaster University, Ontario, Canada L8S 4L7 |
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Abstract: | Soot volume fraction and number density in a turbulent diffusion flame burning kerosene/air were predicted using two approaches. The first used a conventional soot inception model based on the acetylene concentration and is referred to as the acetylene model. The second used a soot inception model based on the formation rate of three and two ring aromatics 1] and is referred to as the PAH inception model. The soot models account for inception, coagulation, surface growth, and oxidation processes. The Favre-averaged governing equations of mass, momentum, and energy in the turbulent field were solved in conjunction with the k − ε turbulence model. A recently developed detailed reaction mechanism for kerosene/air 2] was coupled to the turbulent flow field by the stretched laminar flamelet approach. A radiation heat transfer model that considered the soot, water and CO2 levels is included. Models are validated by comparing the numerical results to the experimental results of Young et al. 3] for a turbulent jet-flame burning pre-vaporized aviation kerosene. Significant improvements in the prediction of soot volume fraction are obtained using the PAH inception model for soot inception compared to the conventional acetylene approach. |
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