CAJ | 학술논문

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。
현대연기륜궤냉각기술비상복잡,해문침대전통적계산투평협편냉각공기량모형적불족,기우열역학、전열학이론,대이왕모형진행수정화개진,건립일충고필료기막냉각화열장도층（thermal barrier coating,TBC）적수정적해석모형。통과대불역측득적협편내부냉각통도삼수적합리처리,모형가계산득출협편적냉각공기수구량이급온도분포정황,병통과산례진행료계산분석,득도교합리적결과。해모형가이용우연궤협편온도실시감측이제고연궤궤조운행적안전성,환가대연궤설계、성능분석화냉각공기량분배공제제공일사삼고。
The modern gas turbine＇s cooling technology is very complex.Based on the principles of thermodynamics and heat transfer,this paper brought up a modified analytical model that considered the film cooling and thermal barrier coating（TBC）,which aimed at the shortcomings of the traditional computational models of calculating the cooling flow required for turbine blades.This model can calculate the cooling air required for blades,and the temperature distribution of the blade surfaces.By dealing with the blade internal cooling parameters,the model can be realized and acquire reasonable results.This model can not only be used for real-time monitoring of gas turbine blade temperature and can also be used to assist in gas turbine design,the performance analysis,and cooling flow＇s distribution control.