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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

网络出版日期: 2025-03-05

基金资助

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).

版权

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

Influence Factors on the Radiation Temperature Measurement Accuracy of Turbine Blades

  • LI Xunfeng ,
  • YAN Hao ,
  • ZHAO Shu’nan ,
  • CHENG Keyong ,
  • CHEN Junlin ,
  • HUAI Xiulan
Expand
  • 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

摘要

根据涡轮叶片材料光谱发射和反射特性以及燃气光谱吸收和发射特性,建立了涡轮叶片三维复杂逆向蒙特卡罗模型,分析了辐射温度测量精度的影响因素。结果表明,减小探头到目标表面的距离可以减少燃气环境对测量精度的影响,提高目标表面的温度和发射率可以提高测量精度;目标表面的双向反射特性变化对辐射温度测量精度的影响很小,为了提高计算效率,可将叶片视为漫反射体;温度测量精度会随着燃气温度、总压和 水蒸气浓度的增加而降低,而目标表面的表观发射率与动叶表面温度测量精度成反比。

本文引用格式

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]. 热科学学报, 2025 , 34(2) : 510 -523 . DOI: 10.1007/s11630-025-2032-6

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.

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