Contactless Diagnostics of Turbine Blade Vibration and Damage

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F11%3A00363222" target="_blank" >RIV/61388998:_____/11:00363222 - isvavai.cz</a>
Result on the web
<a href="http://iopscience.iop.org/1742-6596/305/1/012116" target="_blank" >http://iopscience.iop.org/1742-6596/305/1/012116</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1742-6596/305/1/012116" target="_blank" >10.1088/1742-6596/305/1/012116</a>

Result language
angličtina
Original language name
Contactless Diagnostics of Turbine Blade Vibration and Damage
Original language description
The tip-timing method based on the evaluation of time differences of blade passages in different rotor revolutions has been modified and improved to provide more precise and reliable results. A new approach to the analysis of the amplitude and time differences of impulse signals generated by a blade passage has been applied. Amplitudes and frequencies of vibrations and static position of blades ascertained by the diagnostic process are used to establish the state of blade damage. A contactless diagnostic system VDS-UT based on magneto-resistive sensors was developed in the Institute of Thermomechanics Academy of Sciences of the Czech Republic. The system provides on-line monitoring of vibration amplitudes and frequencies of all blades and notificationof possible blade damage.Evaluation of the axial and circumferential components of the deflections by measuring the amplitude of blade impulse signals results in an overall improvement of the method.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JL - Fatigue and fracture mechanics
OECD FORD branch
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Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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