consequently the creation of an intense recirculation zone mixing the remaining air with the combustion products of the primary zone. So that in the secondary chamber a lean pre-mixed flame is established. It is clear that the success to control NOx emissions depends on the main controlling parameters of the flow dynamic into the combustor, which are: the swirler blades angle, the fuel jet Reynolds number and the global equivalence ratio. Thus, the present paper regards to the influence of these main controlling parameters of the flow dynamic on NOx, besides CO and UHC emissions.