Combustor dome design with three swirlers was experimentally investigated in order taken to widen the operation stability range.The effects of different fuel-air ratio in dome and different injectors were taken into account.Experiment results exhibited that the increasing of fuel air ratio in dome had a good effect on fuel-air ratio at lean blowout

and showed that the design was promising with low fuel air ratio at lean blowout and acceptable smoke number.But at any rate some measures would still be needed to improve the performance of smoke number of the design.