Spectroscopy and Spectral Analysis, Volume. 42, Issue 8, 2587(2022)

Intensity Distribution and Inversion Reconstruction of Spectrum of Hydroxyl Radicals in Spray Combustion of PODE Under Different Environmental Oxygen Concentrations

Xiao-teng ZHANG*... Wei LIU, Hai-feng LIU*;, Zun-qing ZHENG, Zhen-yang MING, Yan-qing CUI, Ming-sheng WEN and Ming-fa YAO |Show fewer author(s)
Author Affiliations
  • State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
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    Figures & Tables(11)
    Schematic diagram of the constant volume combustion chamber system
    Schematic diagram of Abel inversion
    Schematic diagram of Onion-Peeling method
    Abel inversion with noise
    Accumulated OH self-luminescence spectral images of PODE quasi-steady state spray flame along optical path and time under different oxygen concentration conditions
    The variation of the lift-off length of PODE and diesel spray flame with oxygen concentration
    PODE spray flame images under different oxygen concentrations(a): The averaged nature luminosity false-color images of OH spectrum; (b): The averaged nature luminosity false-color images of flame;(c): The single-shot, nature luminosity true-color images of flame
    Abel inversion results of PODE spray flame OH self-luminescence spectrum under oxygen-rich concentration conditions
    • Table 1. Physical and chemical properties of PODE and diesel

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      Table 1. Physical and chemical properties of PODE and diesel

      燃料
      类型
      十六
      烷值
      氧含量/
      Wt%
      低热值/
      (MJ·kg-1)
      密度/
      (g·cm-3)@20 ℃
      初馏点/
      运动粘度/
      (mm2·s-1)@20 ℃
      芳香烃含量/
      Wt%
      理论
      空燃比
      PODE60.747.9521.771.0471532.57705.86
      柴油51042.80.8341903.369.3714.3
    • Table 2. Experimental conditions

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      Table 2. Experimental conditions

      光学测试方法研究对象O2+N2中O2
      体积分数/%
      喷射持续期
      /ms
      曝光时间
      /μs
      环境温度
      /K
      环境压力
      /MPa
      喷射压力
      /MPa
      羟基自发光成像火焰浮起长度
      羟基分布
      15, 21, 40, 60, 80
      40, 60, 80
      73 000
      20
      8004100
    • Table 3. RMSEave of different Abel inversion methods

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      Table 3. RMSEave of different Abel inversion methods

      阿贝尔逆变换方法单峰分布双峰分布
      OP0.062 30.091 3
      OP-Tik0.023 60.033 5
      ATP0.037 90.059 1
      ATP-Tik0.013 20.031 8
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    Xiao-teng ZHANG, Wei LIU, Hai-feng LIU, Zun-qing ZHENG, Zhen-yang MING, Yan-qing CUI, Ming-sheng WEN, Ming-fa YAO. Intensity Distribution and Inversion Reconstruction of Spectrum of Hydroxyl Radicals in Spray Combustion of PODE Under Different Environmental Oxygen Concentrations[J]. Spectroscopy and Spectral Analysis, 2022, 42(8): 2587

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    Paper Information

    Category: Orginal Article

    Received: Jul. 16, 2021

    Accepted: --

    Published Online: Mar. 17, 2025

    The Author Email: ZHANG Xiao-teng (zxt2020201152@tju.edu.cn)

    DOI:10.3964/j.issn.1000-0593(2022)08-2587-08

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