摘要
建立了燃气轮机性能仿真模型、叶片温度模型和叶片应力模型,以获取涡轮叶片的温度和应力.基于蠕变实验获取的Larson-Miller参数,建立了涡轮叶片蠕变损伤评估模型,将该模型分别应用于定时维护和视情维护体系下燃气轮机大修周期的规划.结果表明:压气机故障对蠕变寿命的影响大于涡轮故障;压气机损伤是对蠕变寿命影响最大的气路故障;该模型经校准后可指导实际维护活动.
To obtain the temperature and stress of turbine blades,aperformance simulation model,a blade temperature model and a blade stress model were respectively set up for the gas turbine.Simultaneously,a model for evaluation of turbine blade damages was established based on Larson-Miller parameters obtained by creep experiments,which was used to determine the planning of overhaul period under both time-based and condition-based maintenance system.Results show that the influence of compressor faults on creep life is greater than that of turbine failures,and the compressor blade damage is of the gas path fault maximally impacting the creep life.Therefore the model can be used to guide actual maintenance activities upon calibration.
出处
《动力工程学报》
CAS
CSCD
北大核心
2015年第12期964-969,共6页
Journal of Chinese Society of Power Engineering
关键词
燃气轮机
蠕变
气路故障
模型
视情维护
大修周期
gas turbine
creep
gas path fault
model
condition-based maintenance
overhaul period
