An experimental study was conducted by using different mixing ratios of biodiesel fuels and diesel oil on an angle 90° double swirler combustor under simulative pressure condition to investigate the influence of biodiesel fuels on the combustor performance and emissions of gas turbine. The experimental results show that with the increment of fuel-air ratio

the combustion efficiency and NOx emissions increase

and the outlet temperature distribution factor(OTDF)

radial temperature distribution factor(RTDF) and CO emission decrease; with the increment of biodiesel fuels-diesel oil ratio

the combustion efficiency and outlet temperature rise gradually drop

and the outlet temperature distribution factor and NOx emissions decreases first and then increases

and the radial temperature distribution factor and CO emission increase. With the increment of fuel-air ratio

the influence of biodiesel fuels changes and wears off. Different best biodiesel fuels-diesel oil ratios exist under different conditions of fuel-air ratio.