The Effects of Specifications of a Fuel Supply Unit with a New Concept for a Dry Low NOx Gas Turbine Combustor

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This paper describes the effects of specifications of a fuel supply unit with a new fuel supply concept for a dry low NOx gas turbine combustor. From experiments made with a plane model, most of the specifications of the fuel supply elements strongly affected the fuel distribution ratio between the main and pilot regions, which could affect combustion performance. However, the distribution ratio was hardly changed by the main plates attached at the exit of fuel passage holes, though the fuel distribution in the main region was greatly changed by the plates. From the pressurized combustion test, the main plates decreased NOx emissions at high loads, not affecting any harmful influence on combustion efficiency, EOT, and the pattern factor at high loads. It was estimated that the cause of low NOx could be the uniformity of the equivalence ratio in the main region in the circumferential direction.
2005-07-20