Abstract: A fuel supply system for a combustion chamber having at least two combustion zones in which each combustion zone is arranged at a height different from the other includes a pair of fuel injectors that are configured to supply fuel to respective ones of the combustion zones. The pair of fuel injectors are disposed at different heights corresponding to the different heights of the combustion zones, each of the heights being taken in reference with one of a lower one of the fuel injectors and a horizontal midplane of the combustion chamber. The system also includes a flow control device in fluid communication with at least the lower one of the fuel injectors. The flow control device is configured to selectively regulate a supply of fuel to the lower fuel injector based, at least in part, on an amount of fuel supplied to an upper one of the fuel injectors.

Abstract: A fuel injector for a combustor of a gas turbine engine is disclosed. The fuel injector includes a gas outer tube, a gas inner tube, a liquid tube, and a heat shield. The gas outer tube and the gas inner tube form a gas fuel annulus. The gas inner tube and the liquid tube form a liquid fuel annulus. The liquid tube forms an air cavity. The heat shield extends within the liquid tube forming an insulating gap between the heat shield and the liquid tube.

Abstract: A fuel injector for a combustor of a gas turbine engine is disclosed. The fuel injector includes a gas outer tube, a gas inner tube, a liquid tube, and a heat shield. The gas outer tube and the gas inner tube form a gas fuel annulus. The gas inner tube and the liquid tube form a liquid fuel annulus. The liquid tube forms an air cavity. The heat shield extends within the liquid tube forming an insulating gap between the heat shield and the liquid tube.