Selected Papers from the XXVI Biennial Symposium on Measuring Techniques in Turbomachinery

A special issue of International Journal of Turbomachinery, Propulsion and Power (ISSN 2504-186X).

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 1315

Special Issue Editors


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Guest Editor
Turbomachinery and Propulsion Group, Dipartimento di SM, ITSM—Institute of Thermal Turbomachinery and Machinery Laboratory, University of Stuttgart, 70569 Stuttgart, Germany
Interests: turbomachinery aerodynamics
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Guest Editor
Department of Mechanical Engineering, Muenster University of Applied Sciences, Stegerwaldstr. 39, 48565 Steinfurt, Germany
Interests: thermal turbomachines (turbines); organic-Rankine-cycle (ORC) power systems; non-ideal gas dynamics; convective heat transfer in rotating disk systems

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Guest Editor
Department of Energy, Systems, Territory and Construction Engineering, University of Pisa, 56126 Pisa, Toscana, Italy
Interests: measurement techniques in turbomachinery
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Special Issue Information

Dear Colleagues,

The Biennial Symposium on Measuring Techniques in Turbomachinery is a recurrent event that has been organized every two years at locations across Europe since 1969. The 26th Symposium (MTT2622) was held in Pisa (Italy) https://mtt2622.meastechturbo.com/, on 28–30 September 2022. Since its inception, this symposium has provided a forum for researchers from universities, research institutes and industry to discuss and share experiences related to measurements in turbomachines. The symposium covers the development of measurement techniques for the study of aerothermal phenomena in components such as cascades, compressors, turbines, engines and power plants. The primary topics of this Special Issue include (but are not limited to): measurement techniques; probes and devices; new or advanced test rigs; new techniques for monitoring engine operation, and new methods for experimental data analysis. The 26th edition of this symposium hosted 36 presentations. An extended and revised version of the best papers from the conference, corresponding to the IJTPP scope, are collected in this Special Issue.

Prof. Dr. Damian Vogt
Prof. Dr. Stefan aus der Wiesche
Dr. Lorenzo Ferrari
Guest Editors

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Published Papers (1 paper)

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Research

18 pages, 3967 KiB  
Article
Quantification of Blade Vibration Amplitude in Turbomachinery
by Alexandra P. Schneider, Benoit Paoletti, Xavier Ottavy and Christoph Brandstetter
Int. J. Turbomach. Propuls. Power 2024, 9(1), 10; https://doi.org/10.3390/ijtpp9010010 - 04 Mar 2024
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Abstract
Experimental monitoring of blade vibration in turbomachinery is typically based on blade-mounted strain gauges. Their signals are used to derive vibration amplitudes which are compared to modal scope limits, including a safety factor. According to industrial guidelines, this factor is chosen conservatively to [...] Read more.
Experimental monitoring of blade vibration in turbomachinery is typically based on blade-mounted strain gauges. Their signals are used to derive vibration amplitudes which are compared to modal scope limits, including a safety factor. According to industrial guidelines, this factor is chosen conservatively to ensure safe operation of the machine. Within the experimental campaign with the open-test-case composite fan ECL5/CATANA, which is representative for modern lightweight Ultra High Bypass Ratio (UHBR) architectures, measurements close to the stability limit have been conducted. Investigation of phenomena like non-synchronous vibrations (NSV) and rotating stall require a close approach to the stability limit and hence demand for accurate (real-time) quantification of vibration amplitudes to ensure secure operation without exhaustive safety margins. Historically, short-time Fourier transforms of vibration sensors are used, but the complex nature of the mentioned coupled phenomena has an influence on amplitude accuracy, depending on evaluation parameters, as presented in a previous study using fast-response wall-pressure transducers. The present study investigates the sensitivity of blade vibration data to evaluation parameters for different spectral analysis methods and provides guidelines for fast and robust surveillance of critical vibration modes. Full article
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