Abstract
Based on high-speed turbine-generator rotor system supported by gas bearing, the experimental investigations of influence of supply pressure on the dynamic characteristics of rotor system were carried out. Through nonlinear methods for test, the measurement, and analysis, such as bifurcation plot, shaft center orbits, frequency spectrum plot, and 3-D plot of frequency coupling, the experimental results show the characteristics of double low frequency (DLF) and half-speed whirl and the influence of supply pressure on characteristics of critical speed region and fractional frequency whirl. The results show that occurring speed of DLF and half-speed whirl were improved by gas supply pressure addition, which increases gas film stiffness, so improving the stability of rotor system, while vibration supreme amplitude of half-speed whirl is restrained by gas supply pressure dropped, which increases gas film damping ratio.
| Original language | English |
|---|---|
| Pages (from-to) | 33237-33244 |
| Number of pages | 8 |
| Journal | IEEE Sensors Journal |
| Volume | 25 |
| Issue number | 17 |
| DOIs | |
| State | Published - 2025 |
Keywords
- Double low frequency (DLF)
- gas supply pressure
- half-speed whirl
- high-speed turbine-generator rotor system
- stability
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