中国物理B ›› 2016, Vol. 25 ›› Issue (10): 100701-100701.doi: 10.1088/1674-1056/25/10/100701

• GENERAL • 上一篇    下一篇

Quantitative measurement of hydroxyl radical (OH) concentration in premixed flat flame by combining laser-induced fluorescence and direct absorption spectroscopy

Shuang Chen(陈爽), Tie Su(苏铁), Zhong-Shan Li(李中山), Han-Chen Bai(白菡尘), Bo Yan(闫博), Fu-Rong Yang(杨富荣)   

  1. 1 Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of China Aerodynamic Research and Development Center, Mianyang 621000, China;
    2 China Aerodynamics Research and Development Center, Mianyang 621000, China;
    3 Division of Combustion Physics, Lund University, P. O. Box 118, 22100 Lund, Sweden
  • 收稿日期:2016-03-28 修回日期:2016-06-23 出版日期:2016-10-05 发布日期:2016-10-05
  • 通讯作者: Shuang Chen E-mail:chenshuang827@gmail.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11272338), the Science and Technology on Scramjet Key Laboratory Funding, China (Grant No. STSKFKT 2013004), and the China Scholarship Council.

Quantitative measurement of hydroxyl radical (OH) concentration in premixed flat flame by combining laser-induced fluorescence and direct absorption spectroscopy

Shuang Chen(陈爽)1,2, Tie Su(苏铁)2, Zhong-Shan Li(李中山)3, Han-Chen Bai(白菡尘)1,2, Bo Yan(闫博)2, Fu-Rong Yang(杨富荣)1,2   

  1. 1 Science and Technology on Scramjet Laboratory, Hypervelocity Aerodynamics Institute of China Aerodynamic Research and Development Center, Mianyang 621000, China;
    2 China Aerodynamics Research and Development Center, Mianyang 621000, China;
    3 Division of Combustion Physics, Lund University, P. O. Box 118, 22100 Lund, Sweden
  • Received:2016-03-28 Revised:2016-06-23 Online:2016-10-05 Published:2016-10-05
  • Contact: Shuang Chen E-mail:chenshuang827@gmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11272338), the Science and Technology on Scramjet Key Laboratory Funding, China (Grant No. STSKFKT 2013004), and the China Scholarship Council.

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摘要： An accurate and reasonable technique combining direct absorption spectroscopy and laser-induced fluorescence (LIF) methods is developed to quantitatively measure the concentrations of hydroxyl in CH4/air flat laminar flame. In our approach, particular attention is paid to the linear laser-induced fluorescence and absorption processes, and experimental details as well. Through measuring the temperature, LIF signal distribution and integrated absorption, spatially absolute OH concentrations profiles are successfully resolved. These experimental results are then compared with the numerical simulation. It is proved that the good quality of the results implies that this method is suitable for calibrating the OH-PLIF measurement in a practical combustor.

关键词: laser-induced fluorescence (LIF), direct absorption spectroscopy, hydroxyl radical (OH), quantitative measurement

Abstract: An accurate and reasonable technique combining direct absorption spectroscopy and laser-induced fluorescence (LIF) methods is developed to quantitatively measure the concentrations of hydroxyl in CH4/air flat laminar flame. In our approach, particular attention is paid to the linear laser-induced fluorescence and absorption processes, and experimental details as well. Through measuring the temperature, LIF signal distribution and integrated absorption, spatially absolute OH concentrations profiles are successfully resolved. These experimental results are then compared with the numerical simulation. It is proved that the good quality of the results implies that this method is suitable for calibrating the OH-PLIF measurement in a practical combustor.

Key words: laser-induced fluorescence (LIF), direct absorption spectroscopy, hydroxyl radical (OH), quantitative measurement

中图分类号:  (Visible and ultraviolet spectrometers)

  • 07.60.Rd
33.80.-b (Photon interactions with molecules) 42.62.-b (Laser applications) 42.62.Fi (Laser spectroscopy)