A study on NO_X formation for double swirler combustor

The influences of various fuel-air ratio,inlet temperature and geometric parameters on two-phase combustion integrated flow fields and pollutant NO_x formation in a model gas turbine combustor with a double swirler were investigated experimentally and numerically.Particle image velocimetry(PIV) technique was adopted to measure Profiles of velocity vector of primary combustion zone in model combustor.Multiple-point probes were used to measure radial distributions of outlet temperature and NO_x emission.Fluent commercial software was applied to simulate three-dimensional two-phase combustion flows and pollutant NO_x formation on unstructured grid system in the model combustor.The calculated results were consistent with the test data,showing that the influences of different fuel-air ratio,inlet temperature and primary holes parameters on two-phase flow fields as well as profiles of outlet gas temperature and NO_x are considerable.The outlet gas temperature and NO_x increase with fuel-air ratio and inlet temperature.