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现代燃气轮机冷却技术非常复杂,该文针对传统的计算透平叶片冷却空气量模型的不足,基于热力学、传热学理论,对以往模型进行修正和改进,建立一种考虑了气膜冷却和热障涂层(thermal barrier coating,TBC)的修正的解析模型。通过对不易测得的叶片内部冷却通道参数的合理处理,模型可计算得出叶片的冷却空气需求量以及温度分布情况,并通过算例进行了计算分析,得到较合理的结果。该模型可以用于燃机叶片温度实时监测以提高燃机机组运行的安全性,还可对燃机设计、性能分析和冷却空气量分配控制提供一些参考。
The modern gas turbine cooling technology is very complicated. In order to overcome the shortcomings of the traditional calculation model of the turbine cooling air volume, the paper modifies and improves the previous model based on the theory of thermodynamics and heat transfer, A modified analytical model of the thermal barrier coating (TBC). The reasonable calculation of the cooling air demand and the temperature distribution of the blade can be obtained through the reasonable treatment of the parameters which are not easy to be measured in the inner cooling channel of the blade. The calculation and analysis of the cooling air and the temperature distribution of the blade are carried out, and more reasonable results are obtained. The model can be used for real-time monitoring of gas turbine blade temperature to improve the safety of gas turbine unit operation. It can also provide some references for gas turbine design, performance analysis and control of cooling air distribution.