中国物理B ›› 2015, Vol. 24 ›› Issue (11): 114204-114204.doi: 10.1088/1674-1056/24/11/114204

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Quantitative measurements of one-dimensional OH absolute concentration profiles in a methane/air flat flame by bi-directional laser-induced fluorescence

于欣a b, 杨振a b, 彭江波a b, 张蕾c, 马欲飞a b, 杨超博a b, 李晓晖a b, 孙锐c   

  1. a National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China;
    b Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150080, China;
    c School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • 收稿日期:2015-03-24 修回日期:2015-05-27 出版日期:2015-11-05 发布日期:2015-11-05
  • 通讯作者: Yu Xin, Yang Zhen E-mail:yuxin030685@163.com;sailoryz@163.com
  • 基金资助:
    Project supported by the National Key Scientific Instrument and Equipment Development Projects of China (Grant No. 2012YQ040164), the National Natural Science Foundation of China (Grant Nos. 61275127 and 91441130), the China Postdoctoral Science Foundation (Grant No. 2014M560262), and the Postdoctoral Fellowship in Heilongjiang Province, China (Grant No. LBH-Z14074).

Quantitative measurements of one-dimensional OH absolute concentration profiles in a methane/air flat flame by bi-directional laser-induced fluorescence

Yu Xin (于欣)a b, Yang Zhen (杨振)a b, Peng Jiang-Bo (彭江波)a b, Zhang Lei (张蕾)c, Ma Yu-Fei (马欲飞)a b, Yang Chao-Bo (杨超博)a b, Li Xiao-Hui (李晓晖)a b, Sun Rui (孙锐)c   

  1. a National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China;
    b Institute of Opto-electronics, Harbin Institute of Technology, Harbin 150080, China;
    c School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China
  • Received:2015-03-24 Revised:2015-05-27 Online:2015-11-05 Published:2015-11-05
  • Contact: Yu Xin, Yang Zhen E-mail:yuxin030685@163.com;sailoryz@163.com
  • Supported by:
    Project supported by the National Key Scientific Instrument and Equipment Development Projects of China (Grant No. 2012YQ040164), the National Natural Science Foundation of China (Grant Nos. 61275127 and 91441130), the China Postdoctoral Science Foundation (Grant No. 2014M560262), and the Postdoctoral Fellowship in Heilongjiang Province, China (Grant No. LBH-Z14074).

摘要: The one-dimensional (1D) spatial distributions of OH absolute concentration in methane/air laminar premixed flat flame under different equivalence ratios at atmospheric pressure are investigated by using bi-directional laser-induced fluorescence (LIF) detection scheme combined with the direct absorption spectroscopy. The effective peak absorption cross section and the average temperature at a height of 2 mm above the burner are obtained by exciting absorption on the Q1(8) rotational line in the m A2Σ+ (v’= 0) ≤←X2Π (v"= 0) at 309.240 nm. The measured values are 1.86×10-15 cm2 and 1719 K, respectively. Spatial filtering and frequency filtering methods of reducing noise are used to deal with the experimental data, and the smoothing effects are also compared using the two methods. The spatial distribution regularities of OH concentration are obtained with the equivalence ratios ranging from 0.8 to 1.3. The spatial resolution of the measured result is 84 μm. Finally, a comparison is made between the experimental result of this paper and other relevant study results.

关键词: bi-directional laser-induced fluorescence, laminar premixed flat flame, hydroxyl radical absolute concentration

Abstract: The one-dimensional (1D) spatial distributions of OH absolute concentration in methane/air laminar premixed flat flame under different equivalence ratios at atmospheric pressure are investigated by using bi-directional laser-induced fluorescence (LIF) detection scheme combined with the direct absorption spectroscopy. The effective peak absorption cross section and the average temperature at a height of 2 mm above the burner are obtained by exciting absorption on the Q1(8) rotational line in the m A2Σ+ (v’= 0) ≤←X2Π (v"= 0) at 309.240 nm. The measured values are 1.86×10-15 cm2 and 1719 K, respectively. Spatial filtering and frequency filtering methods of reducing noise are used to deal with the experimental data, and the smoothing effects are also compared using the two methods. The spatial distribution regularities of OH concentration are obtained with the equivalence ratios ranging from 0.8 to 1.3. The spatial resolution of the measured result is 84 μm. Finally, a comparison is made between the experimental result of this paper and other relevant study results.

Key words: bi-directional laser-induced fluorescence, laminar premixed flat flame, hydroxyl radical absolute concentration

中图分类号:  (Laser applications)

  • 42.62.-b
82.40.-g (Chemical kinetics and reactions: special regimes and techniques)