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Design and Performance Analysis for Gas Turbine Compressors with Lean Catalytic Combustion

YIN Juan~1,WENG Yi-wu~1,LIU Ya-qian~2(1.School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai,200030,China;2.Chongqing Jiangjin Turbo & Charger Machinery Company Limited,Chongqing,402263)  
The structure characteristics of a gas turbine compressor with lean catalytic combustion was analysed.The impeller of the compressor with the characteristics of low width-radius ratio and high specific speed was designed.Its working performance was predicted by two methods of numerical calculation and experiments.Results show that the numerical results agree well with the experimental results;the design and off-design performance of the compressor can meet the requirements of design,and the regions of both the high pressure ratio and the high efficiency are far away from the surge line;design point of the compressor with low width-radius ratio and high specific speed is at high-efficiency area;with speed increasing,the trend of performance curve of pressure ratio increases rapidly in the small flow mass area;the negative effects caused by the design of low width-radius ratio and high specific speed is the growth of relative Mach number at the tip of the impeller.
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