FIELD: power industry.
SUBSTANCE: fuel nozzle comprises a passage for the in-line fuel mixture directed into the combustion chamber, which extends through the fuel injector in the longitudinal direction. Fuel nozzle is, moreover, may comprise a channel for liquid fuel which covers at least part of stream passage. The channel may comprise a plurality of fuel nozzles formed for delivering liquid fuel from the fuel passage to the inline passage. The fuel injector may also include an annular outer casing which surrounds the said channel, forming an insulating air cavity, at least around a portion of mentioned channel. The outer shell may comprise at least one opening for purging, providing communication between the insulating air space and an annular shroud surrounding space. It is also provided with a method of bi-fuel gas turbine engine operation.
EFFECT: invention allows to maintain the temperature of the liquid fuel channel below the temperature of the fuel injector fuel coking.
10 cl, 5 dwg
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