variable jet combustor

摘要

A dual fuel nozzle (10) of a gas turbine combustor with a variable jetting hole diameter is disclosed. The combustor includes a plurality of swirling wings (110) disposed along an outer peripheral surface of a central shaft (120) to have at least one main fuel jetting hole, an air duct (112) positioned at the lower side of the swirling wings (110) to supply air to the swirling wings (110), a pilot fuel injection hole (124) and jetting hole formed to pass through a central portion of the central shaft (120) to supply a pilot fuel, a switching plate (130) disposed inside the swirling wings (110) to vary the size of the main fuel jetting hole, a driving unit (140) disposed to be connected to the switching plate (130) to move a position of the switching plate (130), and a casing (160) containing the swirling wings (110), the air duct (112), the switching plate (130) and the driving unit (140). It is possible to enhance fuel flexibility in a multiple fuel system for applying two or more fuels to a gas turbine at the same time.