Combination of optical metrology and non-destructive testing technology for the regeneration of aero engine components
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Nils Melchert
Nils Melchert is working as a research associate at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
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Maximilian K.-B. Weiss
Maximilian K.-B. Weiss is working as a research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Tim Betker is working as a research associate at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
Wojciech Frackowiak is a former research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Renè Gansel is working as a research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Lars Keunecke is a lecturer for quality management at the Leibniz Universität Hannover.
Eduard Reithmeier is the head of the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
Hans Jürgen Maier is head of the Institute of Materials Science at the Leibniz Universität Hannover.
Markus Kästner is the head of the department for “Production Metrology” at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
David Zaremba is the head of the department “Nondestructive Testing Methods” at the Institute of Materials Science at the Leibniz Universität Hannover.
Abstract
The maintenance and repair of jet or gas turbine components has a considerably high share in the overall turbine operating costs. The authors deal with the regeneration process of complex capital goods considering jet engines as an example, with turbine blades being the most important components to be regenerated. In order to decide on a reasonable and economical regeneration path, maintenance approaches typically require detailed knowledge of the shape and wear condition of the components. In order to select suitable repair strategies for each component, the best possible knowledge about geometry, damages and surface topologies is necessary. In order to meet these requirements, a novel combination of non-destructive testing and measuring methods will be presented. Each process can be adapted for inline operation. The presented methods also enable quality control of the regenerated components that have completed their individual regeneration path. Due to the high variety of possible defects on turbine blades, the individually presented methods can be combined to form an inspection sequence. Detailed status monitoring before and after maintenance becomes possible for each component. This provides the basis for further decisions in the regeneration process.
Zusammenfassung
Die Wartung und Reparatur von Strahl- oder Gasturbinenkomponenten hat einen erheblich hohen Anteil an den Gesamtbetriebskosten einer Turbine. Die Autoren beschäftigen sich mit dem Regenerationsprozess von komplexen Investitionsgütern am Beispiel von Strahltriebwerken, wobei die Turbinenschaufeln zu den wichtigsten zu regenerierenden Komponenten gehören. Um über einen sinnvollen und wirtschaftlichen Regenerationspfad zu entscheiden, erfordern Instandhaltungsansätze typischerweise detaillierte Kenntnisse über die Form und den Verschleißzustand der Komponenten. Um geeignete Reparaturstrategien für jedes Bauteil auszuwählen, sind bestmögliche Kenntnisse über Geometrie, Schäden und Oberflächentopologien notwendig. Um diese Anforderungen zu erfüllen, wird eine neuartige Kombination von zerstörungsfreien Prüf- und Messverfahren vorgestellt. Jedes Verfahren kann für den Inline-Betrieb angepasst werden. Die vorgestellten Methoden ermöglichen auch eine Qualitätskontrolle der regenerierten Bauteile, die ihren individuellen Regenerationsweg durchlaufen haben. Aufgrund der hohen Vielfalt möglicher Defekte an Turbinenschaufeln können die einzeln vorgestellten Methoden zu einer Prüfsequenz kombiniert werden. Für jedes Bauteil wird eine detaillierte Zustandsbewertung vor und nach der Wartung möglich. Dies liefert die Grundlage für weitere Entscheidungen im Regenerationsprozess.
Funding source: Deutsche Forschungsgemeinschaft
Award Identifier / Grant number: SFB 871/3 – 119193472
Funding statement: The authors thank the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) for funding this study within the Collaborate Research Center – SFB 871/3 – 119193472 “Regeneration of complex capital goods”, subproject A1 and A2.
About the authors
Nils Melchert is working as a research associate at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
Maximilian K.-B. Weiss is working as a research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Tim Betker is working as a research associate at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
Wojciech Frackowiak is a former research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Renè Gansel is working as a research associate at the Institute of Materials Science at the Leibniz Universität Hannover.
Lars Keunecke is a lecturer for quality management at the Leibniz Universität Hannover.
Eduard Reithmeier is the head of the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
Hans Jürgen Maier is head of the Institute of Materials Science at the Leibniz Universität Hannover.
Markus Kästner is the head of the department for “Production Metrology” at the Institute of Measurement and Automatic Control at the Leibniz Universität Hannover.
David Zaremba is the head of the department “Nondestructive Testing Methods” at the Institute of Materials Science at the Leibniz Universität Hannover.
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© 2021 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Beiträge
- Terahertz based non-destructive testing (NDT)
- X-ray imaging and computed tomography for engineering applications
- Comparison of different SLAM approaches for a driverless race car
- Combination of optical metrology and non-destructive testing technology for the regeneration of aero engine components
- Capacitive micromachined ultrasonic transducers: Transmission evaluation with different membrane materials and dimensions
Articles in the same Issue
- Frontmatter
- Beiträge
- Terahertz based non-destructive testing (NDT)
- X-ray imaging and computed tomography for engineering applications
- Comparison of different SLAM approaches for a driverless race car
- Combination of optical metrology and non-destructive testing technology for the regeneration of aero engine components
- Capacitive micromachined ultrasonic transducers: Transmission evaluation with different membrane materials and dimensions
