An experimental study on typical vibration characteristics of a gas turbine rotor system
HAN Dongjiang1,2，HAO Long1，BI Chunxiao1,2，YANG Jinfu1,2
1.Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;
2.School of Engineering Science,University of Chinese Academy of Sciences, Beijing 100049, China
The test bench of a micro gas turbine generator supported by gas bearing was built.The typical vibration characteristics of the gas bearing-rotor system during the acceleration process of the micro gas turbine generator were shown by experiments.Based on the experimental data, correlation analysis of the coupling relationship between the vibration parameters and the gas turbine operating parameters and the key parameters of the gas bearing, were carried out.The results show that: ① Compressor outlet pressure fluctuation has great influence on rotor axial vibration; ② Micro gas turbine rotor radial vibration is less affected by ignition pressure fluctuation, main fuel combustion pressure fluctuation and pressure fluctuation at compressor outlet; ③ When designing and commissioning micro gas turbine shaft systems supported by a gas bearing, especially for the shafting system whose design speed is above the critical speed of the rotor bending, the fulcrum position, vibration mode and the stiffness and damping matching design of the shafting should be fully considered.The above experimental phenomena and conclusions can be used as the basis for the design and fault diagnosis analysis of micro gas turbine shaft systems.
韩东江1,2，郝龙1，毕春晓1,2，杨金福1,2. 燃气轮机转子系统典型振动特性实验研究[J]. 振动与冲击, 2021, 40(4): 87-93.
HAN Dongjiang1,2，HAO Long1，BI Chunxiao1,2，YANG Jinfu1,2. An experimental study on typical vibration characteristics of a gas turbine rotor system. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(4): 87-93.
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