15 May 2012 Turbine blade tip clearance measurement using a skewed dual-beam fiber optic sensor
Author Affiliations +
Optical Engineering, 51(8), 081514 (2012). doi:10.1117/1.OE.51.8.081514
Optimization and active control of the tip clearance of turbine blades has been identified as a key to improve fuel efficiency, reduce emission, and increase service life of the engine. However, reliable and real-time tip clearance measurement is difficult due to the adverse environmental conditions that are typically found in a turbine. We describe a dual-beam fiber optic measurement system that can measure the tip timing and tip clearance simultaneously. Because the tip timing information is used to calculate the tip clearance, the method is insensitive to the signal intensity variation caused by fluctuations in environmental conditions such as light source instability, contamination, and blade tip imperfection. The system was calibrated and tested using experimental rotors. The test results indicated a high resolution of 4.5 μm and measurement accuracy of ±20 μm over the rotation speed range of 2000 to 10,000 rpm.
© 2012 Society of Photo-Optical Instrumentation Engineers (SPIE)
De-chao Ye, Fa-jie Duan, Hao-tian Guo, Yangzong Li, Kai Wang, "Turbine blade tip clearance measurement using a skewed dual-beam fiber optic sensor," Optical Engineering 51(8), 081514 (15 May 2012). https://doi.org/10.1117/1.OE.51.8.081514


Fiber optic fire sensor
Proceedings of SPIE (March 05 1993)
Prototype of a fiber optic sensor for online measurement of...
Proceedings of SPIE (September 21 1999)
Novel fiber optic sensor for grip testing
Proceedings of SPIE (December 07 2004)
Fiber optic sensors for meteorological data acquisition
Proceedings of SPIE (September 01 1990)

Back to Top