Heat and mass transfer

Influence Factors on the Radiation Temperature Measurement Accuracy of Turbine Blades

  • LI Xunfeng ,
  • YAN Hao ,
  • ZHAO Shu’nan ,
  • CHENG Keyong ,
  • CHEN Junlin ,
  • HUAI Xiulan
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  • 1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
    2. School of Engineering Science, University of the Chinese Academy of Sciences, Beijing 100049, China
    3. Nanjing Institute of Future Energy System, Nanjing 211135, China

Online published: 2025-03-05

Supported by

This study was supported by the Scientific Instrument Developing Project of the Chinese Academy of Sciences (Grant No. YJKYYQ20200016) and the National Science and Technology Major Project of China (Grant No. J2019-V-0006-0100).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2025

Abstract

Backward Monte Carlo method of the complicated and exact three-dimensional turbine with the spectral emission and reflection characteristics of the turbine blades materials and the spectral absorption and emission characteristics of combustion gas is established. The factors affecting the accuracy of the radiation temperature measurement are analyzed. The results show that reducing the distance from the probe to the target surface can reduce the effect of the environment on the measurement accuracy. Increasing the temperature and emissivity of the target surface can improve the measurement accuracy. The reflection characteristics of the surfaces have little influence on the radiation temperature measurement, so the blades can be considered as diffuse reflectors in order to improve the calculation efficiency. The temperature measurement accuracy decreases rapidly as the temperature of the combustion gas increases. The temperature measurement accuracy decreases with the increase of total gas pressure and H2O concentration. When measuring the temperature of rotating blades, the apparent emissivity of the target surface is inversely proportional to the measurement accuracy.

Cite this article

LI Xunfeng , YAN Hao , ZHAO Shu’nan , CHENG Keyong , CHEN Junlin , HUAI Xiulan . Influence Factors on the Radiation Temperature Measurement Accuracy of Turbine Blades[J]. Journal of Thermal Science, 2025 , 34(2) : 510 -523 . DOI: 10.1007/s11630-025-2032-6

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