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Chinese Journal of Lasers, Volume. 49, Issue 13, 1304001(2022)

Heat Release Rate and Flame Thickness of n-butane/Air Jet Flame Measured by Planar Laser-Induced Fluorescence Technology

Chuan Jin1,2, Liqiao Jiang1、*, Fan Li1, Xing Li1, and Xiaohan Wang1
Author Affiliations
  • 1Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • 2Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, Jiangsu, China
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    AbstractGet PDF(in Chinese)
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    Schematic of coflow jet flame measured by planar laser induced fluorescence (OH-PLIF and CH2O-PLIF) technology

    Fig. 1. Schematic of coflow jet flame measured by planar laser induced fluorescence (OH-PLIF and CH2O-PLIF) technology

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    Morphologies and structure characteristics of n-butane/air coflow jet flames under different conditions. (a)(e) Visible light; (b)(f) CH* chemiluminescence; (c)(g) OH-PLIF; (d)(h) CH2O-PLIF

    Fig. 2. Morphologies and structure characteristics of n-butane/air coflow jet flames under different conditions. (a)(e) Visible light; (b)(f) CH* chemiluminescence; (c)(g) OH-PLIF; (d)(h) CH2O-PLIF

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    Spatial distribution of OH radical, CH2O, and heat release rate in flame. (a) (e) OH-PLIF; (b) (f) CH2O-PLIF; (c) (g) [OH]×[CH2O]; (d) (h) overlay

    Fig. 3. Spatial distribution of OH radical, CH2O, and heat release rate in flame. (a) (e) OH-PLIF; (b) (f) CH2O-PLIF; (c) (g) [OH]×[CH2O]; (d) (h) overlay

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    Schematic of extraction data location of flame front in normal direction. (a) OH-PLIF; (b) CH2O-PLIF; (c) CH* chemiluminescence

    Fig. 4. Schematic of extraction data location of flame front in normal direction. (a) OH-PLIF; (b) CH2O-PLIF; (c) CH* chemiluminescence

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    Comparison of OH, CH2O, CH*, and heat release rate distribution along flame normal direction under different combustion conditions. (a) Umix＝1.6 m/s, (b) Umix＝1.8 m/s, (c) Umix＝2.0 m/s @ Φ＝1.1; (d) Φ＝ 1.1, (e) Φ＝1.3, (f) Φ＝1.5 @ Umix＝ 2.0 m/s

    Fig. 5. Comparison of OH, CH2O, CH*, and heat release rate distribution along flame normal direction under different combustion conditions. (a) Umix＝1.6 m/s, (b) Umix＝1.8 m/s, (c) Umix＝2.0 m/s @ Φ＝1.1; (d) Φ＝ 1.1, (e) Φ＝1.3, (f) Φ＝1.5 @ Umix＝ 2.0 m/s

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    Flame thickness indicated by normalized CH* and [OH]×[CH2O] with full width half maximum

    Fig. 6. Flame thickness indicated by normalized CH* and [OH]×[CH2O] with full width half maximum

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    Comparison of flame thickness under three extraction methods. (a) Φ＝1.1; (b) Umix＝2.0 m/s

    Fig. 7. Comparison of flame thickness under three extraction methods. (a) Φ＝1.1; (b) Umix＝2.0 m/s

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    • Table 1. Experimental parameters of coflow jet flames

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      Table 1. Experimental parameters of coflow jet flames

      Case numbern-butane flow rate, QF/(L·min－1)Air flow rate QAir/(L·min－1)Inflow velocity Umix/(m·s－1)Equivalence ratio ΦReynolds number Re
      10.0531.4741.61.1497
      20.0591.6581.81.1558
      30.0651.8432.01.1620
      40.0771.8312.01.3628
      50.0881.8202.01.5636
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    Chuan Jin, Liqiao Jiang, Fan Li, Xing Li, Xiaohan Wang. Heat Release Rate and Flame Thickness of n-butane/Air Jet Flame Measured by Planar Laser-Induced Fluorescence Technology[J]. Chinese Journal of Lasers, 2022, 49(13): 1304001

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    Paper Information

    Category: Measurement and metrology

    Received: Sep. 6, 2021

    Accepted: Nov. 22, 2021

    Published Online: Jun. 30, 2022

    The Author Email: Jiang Liqiao (jianglq@ms.giec.ac.cn)

    DOI:10.3788/CJL202249.1304001

    Topics

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