Abstract
A mathematical model for calculating the three-dimensional flow, gas composition and temperature fields in gas-turbine combustion chambers is described. The model makes use of the density-weighted average forms of the governing conservation equations with the two equation k -e model for turbulent transport. The chemical reactions associated with heat release are assumed to be fast and fluctuations in scalar properties accounted for by use of a β-probability density function (p.d.f.). For liquid spray fuelled combustors the droplet concentration field is described via an equation for the p.d.f. for droplet size. For a propane fuelled model gas turbine combustor the method yields calculated fields of gas composition and pollutants (NO, CO and UHC) which are in good overall agreement with measured values.
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