Abstract
A model for soot formation is presented in which the soot growth rates are determined from a correlation of surface specific growth rates against temperature and mixture fraction. The soot surface area available for growth is obtained from a relationship between soot volume fraction and surface area developed from measurements. The flames modelled are axisymmetric laminar C2H4 and C2H6 diffusion flames which range in flow rate from 2.3 to 44 ml/s. Predicted soot mass flows and soot volume fractions compare well with measurements in the soot formation region of all flames. The present model leads to a coupling between the ultimate soot loading and the initial soot surface area. The ultimate soot loading is also found to be sensitive to the value of the surface growth rates for the individual fuels.
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