| 摘要 |
PROBLEM TO BE SOLVED: To provide a toroidal ring manifold for premixing fuel at a secondary fuel nozzle of a dry type low-NOx gas turbine (DLN gas turbine). SOLUTION: The toroidal ring manifold (200) disperses the premixed fuel with air effectively at the secondary fuel nozzle of the combustor of the DLN gas turbine, and thereby generate stable combustion in low NOx emission. The ring manifold (200) is arranged round a center body hub (565) of a secondary fuel nozzle assembly (500) within a premixing capacity (555) existing between a nozzle center body hub body (565) and a center body cap (570). The ring manifold (200) receives the fuel from the nozzle body and distributes the premixed fuel from a plurality of rows of individual holes formed at the surface downstream into the air stream (545). The number of positions of the rows, the number, sizes, and spaces of holes in each row, and the manifold position in the radial direction within the premixing capacity (555) are optimized for promoting the premixing. COPYRIGHT: (C)2009,JPO&INPIT
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