In an arbitrary curvilinear coordinate system

a multidimensional empirical analysis methodology was developed to calculate the combustion performance of an annular combustor

which consists of the dump diffuser

two-stage flame tube and cooling passages.The RNG k-ε turbulent model was also modified

for enabling correct calculations of three-dimensional and two-phase turbulent reactive flows under a non-staggered grid system.Spray combustion was simulated through EBU-Arrhenius turbulent combustion model

six-flux radiation model and particle trajectory model.And numerical analysis was conducted for the effects of the geometry of swirlers on entire combustor flow fields and combustion performances.Predictions and measurements were in satisfactory agreement

and it was shown that numerical procedures are fairly reasonable and reliable for estimating the combustion performances of annular combustors.