Experimental investigation of an gas turbine combustor adapted to coal gas with heat value over 2500kJ/Nm 3 has been completed at all operation conditions.Test results show that the configuration of the chamber head with double swirlers provides high combustion efficiency and wide stable operation range when excess air coefficient of head ( α 1 ) is in the range of 0 731 to 0 925.Carbon monoxide emission is confined within the required limits.