燃气轮机的设计以及制造方法

Design And Production Methods Of Gas Turbine

Abstract

本发明提供一种燃气轮机的设计以及制造方法,能维持与基准机相等的压缩比且比基准机能削减压缩机流量。基于衍生燃气轮机的压缩机所要求的压缩机流量及压缩比确定衍生燃气轮机的压缩机所要求的环带面积,将压缩机的各级的环带面积成为已确定的环带面积作为条件,确定初级中的内径增加量与外径减少量,以内径增加量为前级的内径增加量以下、外径减少量为前级的外径减少量以上的方式确定中间级的各级的内径增加量及外径减少量,以外径减少量为内径增加量以上的方式确定最终级的内径增加量外径减少量,在各级中,将基准压缩机的构成要素的伴随内径增加量及外径减少量的确定而偏离样式的构成要素的设计数据以适合于该样式的方式进行更新并设计压缩机。
An object is to reduce the compressor flow rate in comparison with the reference model while maintaining a compression ratio equivalent to that in the reference model. Annulus areas required of a compressor 38 of a derivative gas turbine 200 are determined based on a compressor flow rate and a compression ratio required of the compressor 38 of the derivative gas turbine 200. Under the condition that the annulus area of each stage of the compressor 38 becomes equal to the determined annulus area, an inner radius increment and an outer radius decrement of an initial stage 36a are determined, the inner radius increment and the outer radius decrement of each of intermediate stages 36b - 36e are determined so that the inner radius increment is not more than the inner radius increment of the previous stage and the outer radius decrement is not less than the outer radius decrement of the previous stage, and the inner radius increment and the outer radius decrement of a final stage 36f are determined so that the outer radius decrement is not less than the inner radius increment. The compressor 38 is designed by updating design data of components of the reference compressor 15 that deviated from the specifications due to the determination of the inner radius increment and the outer radius decrement so that the updated design data fulfill the specifications in each of the stages 36a - 36f.

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