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Fifth International Symposium on Turbulence and Shear Flow Phenomena
August, 27-29, 2007, Technische Universität München, Munich, Germany

DOI: 10.1615/TSFP5

CONDITIONAL MOMENT CLOSURE MODELLING OF SOOT FORMATION IN TURBULENT NON-PREMIXED, ETHYLENE-AIR FLAMES

pages 1119-1124
DOI: 10.1615/TSFP5.1740
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Краткое описание

Presented are results obtained from the incorporation of a semi-empirical soot model into a first-order Conditional Moment Closure (CMC) approach to modelling turbulent, non-premixed, ethylene-air flames. Soot formation is determined via the solution of two transport equations for the soot mass fraction and the particle number density, with acetylene and benzene employed as the incipient species responsible for soot nucleation. The concentrations of these species are calculated using a detailed gas-phase kinetic scheme involving 463 reactions and 70 species. The study focuses on the influence of differential diffusion of soot particles on soot volume fraction predictions, and the results of calculations are additionally compared with experimental data for the flow field and temperatures of the three ethylene-air flames investigated. Good agreement with soot data is found provided differential diffusion effects are included.

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