Cyclic operation of aero gas turbines – materials and component life implications
| Autor: | D. P. Shepherd, G. F. Harrison, B. Vermeulen, T. J. Ward, A. Wisbey |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
Gas turbines
Engineering Service (systems architecture) Turbine blade business.industry Mechanical Engineering Constitutive equation Metals and Alloys Industrial gas Mechanical engineering Condensed Matter Physics law.invention Electricity generation Creep Mechanics of Materials law Component (UML) Materials Chemistry Ceramics and Composites business |
| Zdroj: | Materials at High Temperatures. 18:231-239 |
| ISSN: | 1878-6413 0960-3409 |
| DOI: | 10.1179/mht.2001.025 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|