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Failure analysis of gas turbine burner tips

机译:燃气轮机燃烧器提示失效分析

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In this study, the causes of failure in gas turbine burner tips were investigated. For this purpose, two burner tips used in a petrochemical company with different failure evidence as well as service times were inspected. These parts showed signs of deterioration such as multiple cracks, corrosion, and wear following 4000 h and 8000 h operations. The examinations included chemical composition analysis using optical emission spectroscopy (OES), stereo-, optical-, and scanning electron microscopy studies, and macro/micro-hardness measurements. These investigations revealed high thermal stresses to be the main failure cause of the burner tips. Moreover, due to flame inclination, a local increase in the temperature in some parts occurred. So, hot oxidation was a further reason for the fracture of these burner tips. Last but not least, improper jointing processes facilitated the failure in the studied components.
机译:在这项研究中,研究了燃气轮机燃烧器提示失效的原因。 为此目的,检查了两种具有不同故障证据的石化公司的两个燃烧器提示以及服务时间。 这些部件显示出劣化的迹象,如诸如4000小时和8000小时后的多种裂缝,腐蚀和磨损。 该检查包括使用光发射光谱(OES),立体,光学和扫描电子显微镜研究和宏/微硬度测量的化学成分分析。 这些调查显示出高热应力是燃烧器提示的主要故障原因。 而且,由于火焰倾斜,发生一些部件的温度局部增加。 因此,热氧化是这些燃烧器提示骨折的进一步原因。 最后但并非最不重要的是,不合适的连接过程促进了研究的失败。

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