In this paper,the head of a low emission coaxial graded combustor for natural gas was taken as the object,and on the premise of the unchanged overall structure,it was scaled and assembled to the combustors of a west-to-east gas pipeline type gas turbine,a heavy-duty gas turbine for power generation,and an aero retrofit type gas turbine according to the equal Mach number criteria.By using numerical simulation to explore methods for improving head adaptability,the results show that reducing the central two-stage equivalence ratio within a reasonable range can improve the combustion efficiency of the combustion chamber to a certain extent.After the efficiency meets the standard,while ensuring stable flame performance in the value class,reducing the value class equivalence ratio can achieve the goal of reducing NOx and CO emissions.By using the above methods,the combustion chamber efficiency of heavy-duty and aviation modified gas turbines for the west-to-east gas pipeline type gas turbine combustor,a heavy-duty gas turbine combustor for power generation,and an aero retrofit type gas turbine combustor can be achieved to be≥99%,and the NOx emission volume concentration can be≤25×10-6,the emission volume concentration of CO≤50×10-6.
关键词
燃气轮机/同轴分级/低排放/头部适应性/燃料分级策略
Key words
gas turbine/coaxial graded/low emissions/head adaptation/fuel classification strategy
维普
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