A nozzle, comprising: a nozzle body (102;202) defining a longitudinal axis including: an air passage; a fuel circuit (106;206) radially outboard from the air passage with respect to the longitudinal axis, the fuel circuit (106;206) extending from a fuel circuit inlet (108;208) to a fuel circuit annular outlet (110;210), wherein the fuel circuit (106;206) is defined between a fuel circuit inner wall (115;215) and a fuel circuit outer wall (116;216), wherein at least a portion of the fuel circuit outer wall (116;216) is radially outboard from the fuel circuit inner wall (115;215) with respect to the longitudinal axis; and a cooling circuit (105;205) defined within at least one of the fuel circuit inner wall (115;215) and the fuel circuit outer wall (116;216), wherein the cooling circuit (105;205) extends from an axial position proximate the fuel circuit inlet (108;208) to an axial position proximate the fuel circuit outlet (110;210); characterized in that the cooling circuit (105;205) includes a distribution channel in fluid communication with a coolant-in channel and a collection channel in fluid communication with a coolant-out channel, wherein the distribution channel and the collection channel are circumferentially spaced apart from one another; and wherein the cooling circuit (105;205) includes a pair of helical threads (133a;133b), wherein a first one of the helical threads begins at the distribution channel and extends to an axial position proximate the fuel circuit outlet (110;210) to provide cooling flow to the nozzle tip, and wherein a first end of a second one of the helical threads is connected to the first helical thread proximate to the fuel circuit outlet (110;210) and extends to the collection channel to provide a cooling flow exit to the coolant-out channel. a nozzle body (102;202) defining a longitudinal axis including: an air passage; a fuel circuit (106;206) radially outboard from the air passage with respect to the longitudinal axis, the fuel circuit (106;206) extending from a fuel circuit inlet (108;208) to a fuel circuit annular outlet (110;210), wherein the fuel circuit (106;206) is defined between a fuel circuit inner wall (115;215) and a fuel circuit outer wall (116;216), wherein at least a portion of the fuel circuit outer wall (116;216) is radially outboard from the fuel circuit inner wall (115;215) with respect to the longitudinal axis; and a cooling circuit (105;205) defined within at least one of the fuel circuit inner wall (115;215) and the fuel circuit outer wall (116;216), wherein the cooling circuit (105;205) extends from an axial position proximate the fuel circuit inlet (108;208) to an axial position proximate the fuel circuit outlet (110;210); characterized in that the cooling circuit (105;205) includes a distribution channel in fluid communication with a coolant-in channel and a collection channel in fluid communication with a coolant-out channel, wherein the distribution channel and the collection channel are circumferentially spaced apart from one another; and wherein the cooling circuit (105;205) includes a pair of helical threads (133a;133b), wherein a first one of the helical threads begins at the distribution channel and extends to an axial position proximate the fuel circuit outlet (110;210) to provide cooling flow to the nozzle tip, and wherein a first end of a second one of the helical threads is connected to the first helical thread proximate to the fuel circuit outlet (110;210) and extends to the collection channel to provide a cooling flow exit to the coolant-out channel. an air passage; a fuel circuit (106;206) radially outboard from the air passage with respect to the longitudinal axis, the fuel circuit (106;206) extending from a fuel circuit inlet (108;208) to a fuel circuit annular outlet (110;210), wherein the fuel circuit (106;206) is defined between a fuel circuit inner wall (115;215) and a fuel circuit outer wall (116;216), wherein at least a portion of the fuel circuit outer wall (116;216) is radially outboard from the fuel circuit inner wall (115;215) with respect to the longitudinal axis; and a cooling circuit (105;205) defined within at least one of the fuel circuit inner wall (115;215) and the fuel circuit outer wall (116;216), wherein the cooling circuit (105;205) extends from an axial position proximate the fuel circuit inlet (108;208) to an axial position proximate the fuel circuit outlet (110;210); characterized in that the cooling circuit (105;205) includes a distribution channel in fluid communication with a coolant-in channel and a collection channel in fluid communication with a coolant-out channel, wherein the distribution channel and the collection channel are circumferentially spaced apart from one another; and