Optical Design and Engineering

Monitoring temperature for gas turbine blade: correction of reflection model

[+] Author Affiliations
Shan Gao, Lixin Wang

Harbin Institute of Technology, School of Electrical Engineering and Automation, Harbin 150001, China

Chi Feng, Yihan Xiao, Ketui Daniel

Harbin Engineering University, School of Information and Communication Engineering, Harbin 150001, China

Opt. Eng. 54(6), 065102 (Jun 16, 2015). doi:10.1117/1.OE.54.6.065102
History: Received March 12, 2015; Accepted May 19, 2015
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Abstract.  For a gas turbine blade working in a narrow space, the accuracy of blade temperature measurements is greatly impacted by environmental irradiation. A reflection model is established by using discrete irregular surfaces to calculate the angle factor between the blade surface and the hot adjacent parts. The model is based on the rotational angles and positions of the blades, and can correct for measurement error caused by background radiation when the blade is located at different rotational positions. This method reduces the impact of reflected radiation on the basis of the turbine’s known geometry and the physical properties of the material. The experimental results show that when the blade temperature is 911.2±5K and the vane temperature ranges from 1011.3 to 1065.8 K, the error decreases from 4.21 to 0.75%.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Shan Gao ; Lixin Wang ; Chi Feng ; Yihan Xiao and Ketui Daniel
"Monitoring temperature for gas turbine blade: correction of reflection model", Opt. Eng. 54(6), 065102 (Jun 16, 2015). ; http://dx.doi.org/10.1117/1.OE.54.6.065102


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