Patent ID: 8365536

Claim:
A dual fuel combustor nozzle comprising: a body member including a first end portion that extends to a second end portion through an intermediate portion, the intermediate portion including an outer wall portion and an inner wall portion, the inner wall portion defining a first fuel plenum configured and disposed to direct a first gaseous fuel through the body member; and an inner nozzle member arranged within the first fuel plenum, the inner nozzle member including a first end section that extends to a second end section through an intermediate section, the intermediate section including an outer wall member exposed to the first fuel plenum and an inner wall member, a support flange having first and second surfaces extending from the outer wall member to the inner wall portion includes at least one first fuel orifice, the support flange at least partially defines the first fuel plenum, the inner wall member defining a second fuel plenum configured and disposed to direct a second gaseous fuel through at least one outlet element of the inner nozzle member, the second end section being spaced from the second end portion of the body member so as to define a pre-emergence zone, the pre-emergence zone being configured and disposed to facilitate mixing of the first and second gaseous fuels passing from respective ones of the at least one first fuel orifice and at least one outlet element when at least two gaseous fuels are passed through the dual fuel nozzle and to prevent back flow from a combustion chamber when only one gaseous fuel is passed through one of the body member and inner nozzle member.