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Multi-spectral temperature measurement method for gas turbine blade

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Abstract

One of the basic methods to improve both the thermal efficiency and power output of a gas turbine is to increase the firing temperature. However, gas turbine blades are easily damaged in harsh high-temperature and high-pressure environments. Therefore, ensuring that the blade temperature remains within the design limits is very important. There are unsolved problems in blade temperature measurement, relating to the emissivity of the blade surface, influences of the combustion gases, and reflections of radiant energy from the surroundings. In this study, the emissivity of blade surfaces has been measured, with errors reduced by a fitting method, influences of the combustion gases have been calculated for different operational conditions, and a reflection model has been built. An iterative computing method is proposed for calculating blade temperatures, and the experimental results show that this method has high precision.

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Authors and Affiliations

  1. Harbin Institute of Technology, Harbin, 150001, China

    Shan Gao & Lixin Wang

  2. Harbin Engineering University, Harbin, 150001, China

    Chi Feng & Dong Li

Authors
  1. Shan Gao
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  2. Chi Feng
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  3. Lixin Wang
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  4. Dong Li
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Correspondence to Shan Gao.

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Gao, S., Feng, C., Wang, L. et al. Multi-spectral temperature measurement method for gas turbine blade. Opt Rev 23, 17–25 (2016). https://doi.org/10.1007/s10043-015-0155-9

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  • DOI: https://doi.org/10.1007/s10043-015-0155-9

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