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Modelling and Validation of the Formation and Oxidation of Cenospheres in a Confined Spray Flame by J. Yuan; V. Semião; M. G. Carvalho is a Engineering article available to read on EtoBox.

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Oil combustion generated particulates are mainly soot formed during gas-phase reactions and cenospheres, consisting of ash and unburnt carbon, formed by the liquid-phase pyrolysis. Both kinds of particulates may lead to fouling, augment emissions and change the heat transfer process inside industrial furnaces. In this work, a model to predict the formation, oxidation and spatial distribution of cenospheres is presented and it is developed based on experimental results and on the governing physical mechanisms. This model was coupled to the standard dual eulerian-lagrangian framework to predict two-phase flows combustion. The gas-phase combustion-related properties are calculated by means of timeaveraged eulerian conservation equations, in addition to the k-turbulence model. The droplets and cenospheres balance equations are solved in a lagrangian fashion, with a stochastic approach to turbulent dispersion. The gaseous turbulent-diffusion flame is modelled using a clipped-Gaussian pdf to account for fluctuations of scalar properties. Chemistry is assumed to be fast. Radiation is modelled by the discrete transfer method. In order to validate the model, the whole procedure was applied

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Author

J. Yuan; V. Semião; M. G. Carvalho

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0363-907X)

Published

1997

Language

EN

Field

Engineering (Physical Sciences)