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Article Navigation> JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY> 2020> 29(3): 425-434
Jun Wu, Haitao Xu, Fengcheng Song, Jun Xu, Yanling Li, Tao Wang. Temperature Field Reconstruction in High-Temperature Gas by Using the Colored Background Oriented Schlieren Method[J]. JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2020, 29(3): 425-434. doi: 10.15918/j.jbit1004-0579.20053
Citation: Jun Wu, Haitao Xu, Fengcheng Song, Jun Xu, Yanling Li, Tao Wang. Temperature Field Reconstruction in High-Temperature Gas by Using the Colored Background Oriented Schlieren Method[J].JOURNAL OF BEIJING INSTITUTE OF TECHNOLOGY, 2020, 29(3): 425-434.doi:10.15918/j.jbit1004-0579.20053
shu

Temperature Field Reconstruction in High-Temperature Gas by Using the Colored Background Oriented Schlieren Method

doi:10.15918/j.jbit1004-0579.20053
  • 1.

    Aeronautical Engineering Institute, Civil Aviation University of China, Tianjin 300300, China

  • 2.

    College of Electronic Information and Automation, Civil Aviation University of China, Tianjin 300300, China

  • 3.

    State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China

Funds:the National Natural Science Foundation of China (52005500); Foundation of Tianjin Educational Committee (2018KJ242); Basic Science-Research Funds of National University (3122019088)
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  • Corresponding author:professor, Ph.D. E-mail:wangtaocauc@163.com
  • Received Date:2020-06-10
  • Publish Date:2020-09-30
    Abstract
  • A 3D temperature field reconstruction method using the colored background oriented schlieren (CBOS) method is proposed to address image blurring due to the different refractive index of the multi-wavelength light and significant errors produced when the traditional background oriented schlieren (BOS) method is applied to high-temperature gas. First, the traditional method is employed to reconstruct the non-uniform 3D temperature field. Second, the CBOS method is applied to correct the distortion. Then, by analyzing the correlation coefficient among different color points of the colored background pattern, the non-uniform temperature field is reconstructed much more accurately. Finally, the experimental results are verified by applying the Runge-Kutta ray-tracing method and the thermocouple contact measurement method. The maximum average temperature error of the CBOS-reconstructed temperature field is 12.92°C, compared with the thermocouples. Therefore, an accurate three-dimensional reconstruction of the temperature field can be achieved by the proposed method effectively.
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