基于功势的燃气轮机广义效率研究

Study on generalized exergy efficiency of gas turbine based on work potential

基于广义的物理内涵,推导出了燃气轮机的各部件的广义效率的表达式.根据各种效率具有"同时归一"的特性,从理论分析和数值计算上进行了验证.分析了各种参数对广义效率的影响.结果表明:燃气广义不仅和部件效率有紧密的自然关系,还和其他热力参数(例如压比)有内在的逻辑关联.并从燃料燃烧的广义效率的角度优化了压气机压比.

The analytical formula about gas turbine components＇ generalized exergy efficiencies was derived by using the intrinsic physical meaning of generalized exergy. The relationships were validated in theoretical analysis and numerical calculation based on the criterion that all kinds of efficiencies must be matched simultaneously. The influences of various parameters on the generalized exergy efficiencies were discussed. The results show that the generalized exergy efficiencies are not only closely related with the component efficiencies,but also logically related with other thermodynamic parameters such as pressure ratio. The compressor pressure ratio was optimized by transferring the stored work potential contained in fuel into generalized exergy.