船用三轴燃气轮机气路故障建模与聚类诊断技术

船用燃气轮机运行在高速、高湿和高盐的工作环境中时，其气路部件在运行过程中发生故障的可能性增大，开展典型气路故障诊断技术研究有助于提升船用燃气轮机运行的可靠性和安全性。通过分析船用燃气轮机积垢、压气机叶顶间隙增大、叶片磨损、机械损伤、涡轮热腐蚀和燃烧室故障等典型气路故障的机理，给出9种典型气路故障时性能参数相对变化的经验判据。采用小偏差建模方法，建立船用三轴燃气轮机气路故障仿真模型，基于经验判据对0.8工况下船用三轴燃气轮机典型气路故障进行模拟，仿真得到9种典型故障下测量参数的相对变化。提出基于聚类分析的船用燃气轮机气路故障诊断方法，并以9种典型气路故障仿真结果为例，验证了该诊断方法的可行性。

Gas Path Fault Modeling and Cluster Diagnosis for Three-Shaft Marine Gas Turbines

When a marine gas turbine works in a high speed, high humidity,and highly salty environ-ment,the gas path components of the turbine are more likely to fail during operations;therefore, it is often essential to analyze the typical gas path failure mechanism and the corresponding diagnostic techniques in order to improve the reliability and safety of marine gas turbine＇s operation. The typical gas path failure, usually resulted from the fouling,compressor blade tip clearance increasing,blades wear,mechanical damage,turbine hot corrosion,and combustor failure is analyzed,and the empirical judgment for the rela-tive performance parameter is also given for nine typical gas path faults. The gas path faults simulation mod-el is then established based on the small deviation method,and typical gas path faults are simulated under the 0.8 operation condition,using a three-shaft marine gas turbine. Finally,a gas path fault diagnosis method for the turbine is introduced based on the clustering analysis technology,which is further validated through simulation tests.