| 摘要 |
A fuel injection nozzle assembly for gas turbine drives has an injection nozzle mounted in a structural part forming an outer housing of the combustion chamber of the gas turbine and extends into a primary zone thereof. In order to prevent carbonizing of the nozzle, the nozzle has a cooling passage extending longitudinally therein and communicates with a passage supplying cooling air thereto. Advantageously, according to a preferred embodiment, the injection nozzle is formed by a central body having a fuel supply passage therein and an outer shielding member such that the cooling air passage is defined between the outer shielding member and the central body. Additionally, the central body is formed of material having the high thermal conductivity of copper while the outer shielding member is formed of a material having the high temperature resistivity and low thermal conductivity of nickel alloys.
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