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Optical Engineering

Monitoring temperature for gas turbine blade: correction of reflection model
Author(s): Shan Gao; Lixin Wang; Chi Feng; Yihan Xiao; Ketui Daniel
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Paper 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±5  K and the vane temperature ranges from 1011.3 to 1065.8 K, the error decreases from 4.21 to 0.75%.

Paper Details

Date Published: 16 June 2015
PDF: 9 pages
Opt. Eng. 54(6) 065102 doi: 10.1117/1.OE.54.6.065102
Published in: Optical Engineering Volume 54, Issue 6
Show Author Affiliations
Shan Gao, Harbin Institute of Technology (China)
Lixin Wang, Harbin Institute of Technology (China)
Chi Feng, Harbin Engineering Univ. (China)
Yihan Xiao, Harbin Engineering Univ. (China)
Ketui Daniel, Harbin Engineering Univ. (China)

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