Abstract: The influential factors of outlet temperature distribution in single vortex/lean oil trapped vortex combustor were studied experimentally.Some results were obtained by analyzing the experimental data:(1) Cavity gas amount has great effect on outlet temperature distribution.Outlet temperature distribution factor(OTDF) firstly increases and then decreases with the growing cavity gas amount.This is related with the penetration depth of mixing jet.(2) Fuel mixing temperature also has great effect on outlet temperature distribution.When the fuel mixing temperature is low,OTDF is low.Also,OTDF firstly increases and then decreases with the higher fuel temperature.(3) Fuel amount also has important effect on outlet temperature distribution.When fuel amount becomes larger,OTDF firstly increases and then decreases.