Monitoring temperature for gas turbine blade: correction of reflection model

Shan Gao; Lixin Wang; Chi Feng; Yihan Xiao; Ketui Daniel

doi:10.1117/1.OE.54.6.065102

16 June 2015 Monitoring temperature for gas turbine blade: correction of reflection model

Shan Gao, Lixin Wang, Chi Feng, Yihan Xiao, Ketui Daniel

Author Affiliations +

Optical Engineering, Vol. 54, Issue 6, 065102 (June 2015). https://doi.org/10.1117/1.OE.54.6.065102

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%.

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Shan Gao, Lixin Wang, Chi Feng, Yihan Xiao, and Ketui Daniel "Monitoring temperature for gas turbine blade: correction of reflection model," Optical Engineering 54(6), 065102 (16 June 2015). https://doi.org/10.1117/1.OE.54.6.065102

Published: 16 June 2015

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