中国物理B ›› 2016, Vol. 25 ›› Issue (6): 60703-060703.doi: 10.1088/1674-1056/25/6/060703

• GENERAL • 上一篇    下一篇

Numerical analysis of quantitative measurement of hydroxyl radical concentration using laser-induced fluorescence in flame

Shuang Chen(陈爽), Tie Su(苏铁), Yao-Bang Zheng(郑尧邦), Li Chen(陈力), Ting-Xu Liu(刘亭序), Ren-Bing Li(李仁兵), Fu-Rong Yang(杨富荣)   

  1. 1 Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Hypervelocity Aerodynamics Institute, Mianyang 621000, China;
    2 China Aerodynamics Research and Development Center, Mianyang 621000, China
  • 收稿日期:2015-09-23 修回日期:2016-02-15 出版日期:2016-06-05 发布日期:2016-06-05
  • 通讯作者: Shuang Chen E-mail:chenshuang827@gamil.com
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant No. 11272338) and the Fund from the Science and Technology on Scramjet Key Laboratory, China (Grant No. STSKFKT2013004).

Numerical analysis of quantitative measurement of hydroxyl radical concentration using laser-induced fluorescence in flame

Shuang Chen(陈爽)1,2, Tie Su(苏铁)2, Yao-Bang Zheng(郑尧邦)2, Li Chen(陈力)2, Ting-Xu Liu(刘亭序)2, Ren-Bing Li(李仁兵)2, Fu-Rong Yang(杨富荣)1,2   

  1. 1 Science and Technology on Scramjet Laboratory, China Aerodynamics Research and Development Center, Hypervelocity Aerodynamics Institute, Mianyang 621000, China;
    2 China Aerodynamics Research and Development Center, Mianyang 621000, China
  • Received:2015-09-23 Revised:2016-02-15 Online:2016-06-05 Published:2016-06-05
  • Contact: Shuang Chen E-mail:chenshuang827@gamil.com
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant No. 11272338) and the Fund from the Science and Technology on Scramjet Key Laboratory, China (Grant No. STSKFKT2013004).

摘要:

The aim of the present work is to quantitatively measure the hydroxyl radical concentration by using LIF (laser-induced fluorescence) in flame. The detailed physical models of spectral absorption lineshape broadening, collisional transition and quenching at elevated pressure are built. The fine energy level structure of the OH molecule is illustrated to understand the process with laser-induced fluorescence emission and others in the case without radiation, which include collisional quenching, rotational energy transfer (RET), and vibrational energy transfer (VET). Based on these, some numerical results are achieved by simulations in order to evaluate the fluorescence yield at elevated pressure. These results are useful for understanding the real physical processes in OH-LIF technique and finding a way to calibrate the signal for quantitative measurement of OH concentration in a practical combustor.

关键词: laser-induced fluorescence, hydroxyl radical, quenching, quantitative measurement

Abstract:

The aim of the present work is to quantitatively measure the hydroxyl radical concentration by using LIF (laser-induced fluorescence) in flame. The detailed physical models of spectral absorption lineshape broadening, collisional transition and quenching at elevated pressure are built. The fine energy level structure of the OH molecule is illustrated to understand the process with laser-induced fluorescence emission and others in the case without radiation, which include collisional quenching, rotational energy transfer (RET), and vibrational energy transfer (VET). Based on these, some numerical results are achieved by simulations in order to evaluate the fluorescence yield at elevated pressure. These results are useful for understanding the real physical processes in OH-LIF technique and finding a way to calibrate the signal for quantitative measurement of OH concentration in a practical combustor.

Key words: laser-induced fluorescence, hydroxyl radical, quenching, 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)