Numerical Study of Vibration Characteristics for Sensor Membrane in Transformer Oil

Wenrong Si, Weiqiang Yao, Hong Guan, Chenzhao Fu, Yiting Yu, Shiwei Su and Jian Yang
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Wenrong Si: State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
Weiqiang Yao: State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
Hong Guan: State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
Chenzhao Fu: State Grid Shanghai Electrical Power Research Institute, Shanghai 200437, China
Yiting Yu: MOE Key Laboratory of Micro/Nano Systems for Aerospace, Northwestern Polytechnical University, Xi’an 710072, China
Shiwei Su: MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Jian Yang: MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Energies, 2021, vol. 14, issue 6, 1-18

Abstract: Membrane is the most important element of extrinsic Fabry-Perot interferometer sensors. Studying the relationship between working medium viscosity and membrane vibration characteristics are critical to the sensor design because the transformer oil viscosity will cause viscous loss during membrane vibration. The numerical investigation of membrane vibration characteristics in transformer oil is performed based on the finite element method. Besides, the effect of energy loss caused by viscosity is examined. It is firstly showed that the membrane has the highest sensitivity for the first-order vibration mode, and the transformer oil reduces the fundamental frequency by 60%. Subsequently, when viscosity and heat loss are considered, the amplitude is less than one-fifth of that without energy loss. The viscosity has a more significant effect on the velocity and temperature fields when the vibration frequency is close to the natural frequency. Finally, viscosity has a remarkable impact on the time domain response. Mechanical energy is converted into thermal energy during the vibration and the amplitude will gradually decrease with time. The effect of energy loss caused by viscosity on the membrane vibration characteristics is revealed, which would be important for an oil-immersed membrane design.

Keywords: extrinsic Fabry-Perot interferometer; membrane vibration; transformer oil; heat transfer; numerical simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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