采用蒸汽冷却的各种燃气轮机循环性能分析

Performance Analysis of Various Gas Turbine Cycles Using Steam Cooling

蒸汽冷却以其优异的传热性能有可能成为新一代的冷却技术，以提高燃气轮机的循环性能．以空气冷却为参照，对采用蒸汽冷却的各种燃机循环性能进行了计算分析．对透平膨胀过程中的传热和作功过程进行简化，建立了叶片冷却的计算模型；采用该模型对简单循环、ＳＴＩＧ和ＩＳＴＩＧ等循环方式中分别采用蒸汽和空气冷却时的性能进行了对比研究。

Compared with air blade cooling technology,peformance analysis of various gas turbine cycles using steam blade cooling technology was carried out.Firstly,the heat transfer and work output process in the turbine expansion was simplified to establish a computational model for blade cooling.Then the performance analysis was carried out for a gas turbine simple cycle,STIG and ISTIG with this model.The performance of steam cooling and air cooling was compared.The potential of the steam cooling technology in various gas turbine cycles was analyzed.