Rd. Boardman et al., COMPARISON OF MEASUREMENTS AND PREDICTIONS OF FLAME STRUCTURE AND THERMAL NO(X), IN A SWIRLING, NATURAL-GAS DIFFUSION FLAME, Combustion science and technology, 93(1-6), 1993, pp. 193-210
A combined thermal and fuel NO(x) submodel has recently been added to
a generalized, 2-dimensional pulverized coal gasification and combusti
on model (PCGC-2). This model is applicable to reacting and non-reacti
ng gaseous and particle-laden flows. The thermal NO model is based on
the extended Zel'dovich mechanism. To perform an evaluation of the NO(
x) submodel, combustion measurements of gas velocities, temperatures,
and species concentrations were made in a laboratory-scale, experiment
al reactor with a 150 kW natural gas flame at an equivalence ratio of
1.05 and a secondary-air swirl number of 1.5. Combustion measurements
of velocities and major species concentrations show generally good agr
eement with predicted values. Gas temperature measurements closely mat
ch predictions in the recovery region but fail to show predicted high
temperature in the annular region. This study provides an evaluation o
f a comprehensive combustion model and the NO(x) submodel which can be
useful as a design tool to provide pollutant formation trends in appl
ied systems as combustion parameters are varied.