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Chinese Journal of Lasers, Volume. 48, Issue 7, 0711002(2021)

Two-Dimensional Reconstruction of Combustion Flow Field Using Wavelength-Modulated Absorption Spectra

Xingping Wang1,2, Dong Peng1, Jiasheng Li1, Yi Jin3、*, and Chao Zhai3
Author Affiliations
  • 1School of Engineering Science, University of Science and Technology of China, Hefei, Anhui 230027, China
  • 2Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Science, Hefei, Anhui 230027, China
  • 3Experimental Center of Engineering and Material Science, University of Science and Technology of China, Hefei, Anhui 230027, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (26)
    Cited By (9)
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    Figures & Tables(11)
    Flow chart of reconstruction of temperature field

    Fig. 1. Flow chart of reconstruction of temperature field

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    Initial temperature distribution

    Fig. 2. Initial temperature distribution

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    Reconstruction results under different noise intensity. (a) Result obtained based on WMS for IRIN=-140 dB·Hz-1; (b) result obtained based on DAS for IRIN=-140 dB·Hz-1; (c) result obtained based on WMS for IRIN=-150 dB·Hz-1; (d) result obtained based on DAS for IRIN=-150 dB·Hz-1; (e) result obtained based on WMS for IRIN=-160 dB·Hz-1; (f) result obtained based on DAS for IRIN=-160 dB·Hz-1; (g) result obtained based on WMS without noise; (h) result obtained based on DAS without noise

    Fig. 3. Reconstruction results under different noise intensity. (a) Result obtained based on WMS for IRIN=-140 dB·Hz-1; (b) result obtained based on DAS for IRIN=-140 dB·Hz-1; (c) result obtained based on WMS for IRIN=-150 dB·Hz-1; (d) result obtained based on DAS for IRIN=-150 dB·Hz-1; (e) result obtained based on WMS for IRIN=-160 dB·Hz-1; (f) result obtained based on DAS for IRIN=-160 dB·Hz-1; (g) result obtained based on WMS without noise; (h) result obtained based on DAS without noise

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    Schematic diagram of measurement system

    Fig. 4. Schematic diagram of measurement system

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    Model of collimator installation fixture, and grid division diagram of flow field to be tested. (a) Model of collimator installation fixture; (b) grid division diagram of flow field to be tested

    Fig. 5. Model of collimator installation fixture, and grid division diagram of flow field to be tested. (a) Model of collimator installation fixture; (b) grid division diagram of flow field to be tested

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    Schematic diagram of ray arrangement and position measurement. (a) Ray arrangement; (b) position measurement

    Fig. 6. Schematic diagram of ray arrangement and position measurement. (a) Ray arrangement; (b) position measurement

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    Temperature distributions of flow field measured by thermocouple (units: K). (a) Before interpolation; (b) after interpolation

    Fig. 7. Temperature distributions of flow field measured by thermocouple (units: K). (a) Before interpolation; (b) after interpolation

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    Results of temperature reconstruction (units: K). (a) Reconstruction method based on DAS; (b) reconstruction method based on WMS

    Fig. 8. Results of temperature reconstruction (units: K). (a) Reconstruction method based on DAS; (b) reconstruction method based on WMS

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    Results of temperature reconstruction and deviation of temperature measurement. (a) Result of temperature reconstruction based on DAS; (b) deviation of temperature measurement based on DAS; (c) result of temperature reconstruction based on WMS; (d) deviation of temperature measurement based on WMS

    Fig. 9. Results of temperature reconstruction and deviation of temperature measurement. (a) Result of temperature reconstruction based on DAS; (b) deviation of temperature measurement based on DAS; (c) result of temperature reconstruction based on WMS; (d) deviation of temperature measurement based on WMS

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    • Table 1. Spectral line parameters of temperature measurement for H2O

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      Table 1. Spectral line parameters of temperature measurement for H2O

      Center frequency ν0 /cm-1Absorption line intensity S /(cm-2∙atm-1)Energy atlow stateE' /cm-1
      7185.607.91×10-221045.06
      7168.441.17×10-20173.37

    • Table 2. 2D temperature reconstruction error at different noise intensity obtained based on WMS and DAS

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      Table 2. 2D temperature reconstruction error at different noise intensity obtained based on WMS and DAS

      Noise level /(dB·Hz-1)WMSDAS
      DeEm /KDeEm /K
      -1400.020649.80.0795353.6
      -1500.019345.60.0359155.9
      -1600.019241.60.021771.3
      Non-noise0.018640.30.019242.5
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    Xingping Wang, Dong Peng, Jiasheng Li, Yi Jin, Chao Zhai. Two-Dimensional Reconstruction of Combustion Flow Field Using Wavelength-Modulated Absorption Spectra[J]. Chinese Journal of Lasers, 2021, 48(7): 0711002

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    Paper Information

    Category: spectroscopy

    Received: Aug. 24, 2020

    Accepted: Nov. 2, 2020

    Published Online: Mar. 29, 2021

    The Author Email: Jin Yi (yjin@ustc.edu.cn)

    DOI:10.3788/CJL202148.0711002

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology