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Cyclic operation of aero gas turbines -materials and component life implications

机译：航空燃气轮机的循环运行-材料和组件寿命的影响

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Historically, the issues connected with the lifing of power generation gas turbine components have been very different from those associated with aero engines. Specifically, component lives in the power generation application have been dictated by creep and high cycle fatigue, whereas low cycle fatigue has been the driver for aero engines. However, developments in the design and usage of gas turbines within the respective industries have resulted in this distinction becoming increasingly blurred. This paper highlights recent advances in the materials technology, stress analysis and lifing of aero engine components, which are potentially relevant to industrial gas turbines. In particular, the development of complex constitutive equations for modelling plasticity and anisotropic creep are discussed, with particular reference to the behaviour of single crystal turbine blades. Moreover, developments in the methodologies used to estimate safe service lives for the components are considered. Specifically, a new lifing procedure, capable of accurately predicting component lives from plain specimen data alone, is discussed.
机译：从历史上看，与发电燃气轮机部件的起吊有关的问题与与航空发动机有关的问题有很大不同。具体而言，发电应用中的组件寿命取决于蠕变和高循环疲劳，而低循环疲劳一直是航空发动机的驱动力。但是，各个行业中燃气轮机的设计和使用方面的发展导致这种区别变得越来越模糊。本文重点介绍了航空发动机部件的材料技术，应力分析和起重技术的最新进展，这些进展可能与工业燃气轮机有关。特别是，讨论了用于建模可塑性和各向异性蠕变的复杂本构方程的开发，特别是参考了单晶涡轮叶片的特性。此外，考虑了用于估计组件的安全使用寿命的方法的发展。特别地，讨论了一种仅能从普通样本数据中准确预测组件寿命的新型起重程序。

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