Optical array-pyrometer for measuring temperature distribution of aero-engine turbine disk.
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| Title: | Optical array-pyrometer for measuring temperature distribution of aero-engine turbine disk. |
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| Authors: | Zhang, Zezhan1 (AUTHOR), Huang, Hairui1 (AUTHOR), Zhang, Zixiang1 (AUTHOR), Zhang, Wei1 (AUTHOR), Xu, Jiawen1 (AUTHOR), Gao, Shan2 (AUTHOR), Wang, Chao1,3 (AUTHOR) c_wang@tsinghua.edu.cn, Niu, Yi1 (AUTHOR) niuyi@uestc.edu.cn, Jiang, Jing1 (AUTHOR) jiangj@uestc.edu.cn |
| Source: | Infrared Physics & Technology. May2026, Vol. 155, pN.PAG-N.PAG. 1p. |
| Subjects: | Pyrometry, Pyrometers, Thermal stability, Infrared imaging, Color temperature, Temperature measurements, Rotors |
| Abstract: | • An optical array scanning method is proposed for measuring turbine disk temperature field under operating conditions. • Tiny optical probe stable at 500°C for 3 h without cooling suits aircraft engines' confined, high-temp measurement. • 2D temperature field reconstruction via a 1D ring for turbine disks captures rotating high-temp disk temperature distribution. The turbine disk of an aero-engine is a vital component that endures high temperatures and strong stress loads, making the measurement of its temperature distribution essential. Current methods for measuring the temperature distribution of a turbine disk are not effective for online use due to high rotational speeds, challenging measurement conditions, and limited space. Therefore, this study introduces an optical array-pyrometer for assessing the turbine disk's temperature distribution. Initially, a 3-hour thermal stability test was conducted on a tiny optical probe at 500°C, showing that the energy transmission efficiency and structural stability of the probe remained steady, and the optical-electric conversion linearity was maintained. Next, an accuracy test using a static alloy sample was performed. The maximum measurement error for colorimetric thermometry was 1.73%, significantly lower than the 13.88% error observed with brightness thermometry. Finally, the optical array-pyrometer was employed to measure a rotating high-temperature disk sample, and the resulting temperature distribution accurately reflected the sample's true temperature distribution. The optical array-pyrometer uses high-speed single-point temperature measurement, and its array-based design compensates for the slower frame rate of the infrared thermal imager, offering a new method for online measurement of the turbine disk temperature distribution. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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