为分析燃气轮机热力参数设计并优化运行调控手段,对美国通用电气公司PG9351FA型燃气轮机机组设计工况建立了热力模型,模型分为标准工况模型和透平逐级膨胀模型。模型考虑压气机进气湿度和气体比热随温度的变化情况,模型输出包括燃料、空气和燃气的气体性质、机组燃料量、冷却空气量、一级静叶冷却空气量、当量透平前温、压气机效率等关键参数。结果表明:两种模型计算误差在工程可接受误差范围内；F级燃气轮机冷却空气量占比接近20%,其中一级静叶冷却空气量达总冷却空气量50%以上；空气、燃料和ISO模型燃气比热比分别为1.3885,1.2516,1.3049,透平各级燃气比热比分别为1.2899,1.3085,1.3224。研究结果对F级燃气轮机的热力设计具有一定参考意义。

In order to analyze the design of thermal parameters of gas turbine and optimize the operation control method, a thermal model was established for the design conditions of PG9351FA gas turbine unit of General Electric Company of the United States, and the model was divided into standard working condition model and turbine stepwise expansion model. The model considers the changes of inlet air humidity and gas specific heat with temperature, and the model output includes key parameters such as the gas properties of fuel, air and gas, unit fuel quantity, cooling air volume, first-stage static blade cooling air volume, equivalent turbine pre-turbine temperature, compressor efficiency and so on. The results show that the calculation error of the two models is within the acceptable error range of the project. The cooling air volume of F-class gas turbine accounts for nearly 20%, of which the cooling air volume of the first-stage static blade reaches more than 50% of the total cooling air volume; The specific heat ratios of air, fuel and ISO model gas were 1.3885, 1.2516 and 1.3049, respectively, and the specific heat ratios of turbine gas were 1.2899, 1.3085 and 1.3224, respectively. The research results have certain reference significance for the thermal design of F-class gas turbines.