An experimental investigation of the effects of turbulence generators attached to an axial swirler nozzle on mixing and combustion

A swirler with turbulence generator was designed and manufactured for generating many small-scale eddies in the combustor which contributed to the enhancement of the mixing between fuel and air. Four kinds of swirlers with different turbulence generator areas (0, 3, 7, and 12% of reducing flow area) were designed to confirm the effect of mixing according to the variation of the area of the turbulence generator. The mixing in the combustor in the radial direction was significantly improved and flames and temperature were well distributed throughout the cross section of the combustor as the area of turbulence generator increased.