Abstract
This paper describes the combustion performance of a dry low-NOx gas turbine combustor designed with an innovative fuel supply concept using gaseous fuel. This concept uses spontaneous fuel distribution achieved by an interaction between the gaseous fuel jet and the airflow. Previously, we proved that fuel distribution based on the innovative fuel supply concept actually occurred according to the load by means of pressurized combustion tests using a prototype combustor. However, NOx was not low enough at high loads, and combustion efficiency was not high at medium and low loads. Further, the pressure loss of the combustor was high. Therefore, the prototype combustor was improved from the viewpoint of NOx, combustion efficiency and combustor pressure loss. This paper describes the detailed structure of the improved combustors and the results of the pressurized combustion experiments.
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