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Taxonomy of Gas Turbine Blade Defects

Department of Mechanical Engineering, University of Canterbury, Christchurch 8041, New Zealand
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Aerospace 2019, 6(5), 58; https://doi.org/10.3390/aerospace6050058
Received: 4 April 2019 / Revised: 27 April 2019 / Accepted: 17 May 2019 / Published: 21 May 2019
(This article belongs to the Special Issue Managing Data and Information of Aerospace Product Lifecycle)
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Abstract

Context—The maintenance of aero engines is intricate, time-consuming, costly and has significant functional and safety implications. Engine blades and vanes are the most rejected parts during engine maintenance. Consequently, there is an ongoing need for more effective and efficient inspection processes. Purpose—This paper defines engine blade defects, assigns root-causes, shows causal links and cascade effects and provides a taxonomy system. Approach—Defect types were identified from the literature and maintenance manuals, categorisations were devised and an ontology was created. Results—Defect was categorised into Surface Damage, Wear, Material Separation and Material Deformation. A second categorisation identified potential causes of Impact, Environmental causes, Operational causes, Poor maintenance, Poor manufacturing and Fatigue. These two categorisations were integrated with an ontology. Originality—The work provides a single comprehensive illustrated list of engine blade defects, and a standardised defect terminology, which currently does not exist in the aviation industry. It proposes a taxonomy for both engine blade defects and root-causes, and shows that these may be related using an ontology. View Full-Text
Keywords: aero engine; blade defects; blade failure; gas turbine; NDI; NDT; MRO; ontology; visual inspection aero engine; blade defects; blade failure; gas turbine; NDI; NDT; MRO; ontology; visual inspection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Aust, J.; Pons, D. Taxonomy of Gas Turbine Blade Defects. Aerospace 2019, 6, 58.

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