Deterministic and Statistical Methods for Evaluating Turbine Rotor Speed Instabilities

0517332 - ÚT 2022 RIV US eng J - Journal Article
Procházka, Pavel - Maturkanič, Dušan - Košina, Jan - Brabec, Marek
Deterministic and Statistical Methods for Evaluating Turbine Rotor Speed Instabilities.
IEEE Transactions on Instrumentation and Measurement. Roč. 69, č. 4 (2020), s. 1416-1425. ISSN 0018-9456. E-ISSN 1557-9662
R&D Projects: GA MŠMT(CZ) EF15_003/0000493
Grant - others:AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institutional support: RVO:61388998 ; RVO:67985807
Keywords : vibrations * frequency measurement * fluctuations * rotors * blades * turbines
OECD category: Applied mechanics; Statistics and probability (UIVT-O)
Impact factor: 4.016, year: 2020
Method of publishing: Limited access
https://ieeexplore.ieee.org/document/8694815

The paper deals with the measurement and assessment of rotor speed instabilities. Mean attention is paid to measurements on turbine rotors while using the Blade Tip-Timing Method. The problematic was investigated on the model test turbine wheel of the Institute of Thermomechanics. A novel signal processing method, which consists of a combination of smoothing and approximation, is presented here. This procedure enables to define the instability function over a wide range of speeds and features more than one order shorter calculation time compared to FFT. Moreover, the statistical approach was applied to test the time variability hypothesis of the studied processes, which proved to be a very effective way for evaluating the nature of these processes.
Permanent Link: http://hdl.handle.net/11104/0303685