For a single-dome annular combustor rectangular model with dual-swirler,including discrete jets and radial swirler,the velocity field in primary zone was measured with Particle Image Velocimetry(PIV)in isothermal condition with 300 K. The isothermal and reacting flowfield of combustor were simulated with Realizable κ-? turbulent model and Steady Laminar Flamelet combustion model,obtaining distribution of velocity and flowfield structure,which are compared with the experiment results. The results indicate th...