Deterministic and Statistical Methods for Evaluating Turbine Rotor Speed Instabilities

0517332 - ÚT 2022 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA MŠMT(CZ) EF15_003/0000493
Grant ostatní: AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institucionální podpora: RVO:61388998 ; RVO:67985807
Klíčová slova: vibrations * frequency measurement * fluctuations * rotors * blades * turbines
Obor OECD: Applied mechanics; Statistics and probability (UIVT-O)
Impakt faktor: 4.016, rok: 2020
Způsob publikování: Omezený přístup
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.
Trvalý link: http://hdl.handle.net/11104/0303685