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OH和CH2O平面激光诱导荧光同时成像火焰结构

朱家健 赵国焱 龙铁汉 孙明波 李庆 梁剑寒

朱家健, 赵国焱, 龙铁汉, 等. OH和CH2O平面激光诱导荧光同时成像火焰结构[J]. 实验流体力学, 2016, 30(5): 55-60. doi: 10.11729/syltlx20160026
引用本文: 朱家健, 赵国焱, 龙铁汉, 等. OH和CH2O平面激光诱导荧光同时成像火焰结构[J]. 实验流体力学, 2016, 30(5): 55-60. doi: 10.11729/syltlx20160026
Zhu Jiajian, Zhao Guoyan, Long Tiehan, et al. Simultaneous OH and CH2O PLIF imaging of flame structures[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(5): 55-60. doi: 10.11729/syltlx20160026
Citation: Zhu Jiajian, Zhao Guoyan, Long Tiehan, et al. Simultaneous OH and CH2O PLIF imaging of flame structures[J]. Journal of Experiments in Fluid Mechanics, 2016, 30(5): 55-60. doi: 10.11729/syltlx20160026

OH和CH2O平面激光诱导荧光同时成像火焰结构

doi: 10.11729/syltlx20160026
详细信息
    作者简介:

    朱家健(1987-), 男, 贵州威宁人, 讲师。研究方向:激光燃烧诊断和等离子体助燃。通信地址:湖南省长沙市开福区德路109号一院高超重点室(410073)。E-mail:jjzhu@nudt.edu.cn

    通讯作者:

    孙明波, E-mail:sunmingbonudt@sina.com

  • 中图分类号: O643.2

Simultaneous OH and CH2O PLIF imaging of flame structures

  • 摘要: OH和CH2O平面激光诱导荧光(PLIF)同时成像技术在研究火焰结构和燃烧反应中间产物二维分布等方面能够发挥重要作用。OH的分布被用来表征火焰反应区的结构,而CH2O的分布则被用来显示火焰预热区的分布。利用OH和CH2O PLIF同时成像技术研究了甲烷/空气部分预混火焰的结构。从实验系统、光路调节、时序同步、OH A-X(1,0)扫谱、数据采集和处理等方面讨论了PLIF同时成像技术的实验方法。实验结果表明,OH和CH2O PLIF同时成像能够分别呈现甲烷/空气部分预混火焰反应区和预热区不同形状的瞬时结构;由于反应区在相邻位置的结合,在火焰中能够局部生成新的分裂的预热区。
  • 图  1  OH和CH2O PLIF同时成像实验系统示意图和甲烷/空气部分预混层流火焰图像

    Figure  1.  Schematic of the experimental setup for simultaneous OH/CH2O PLIF imaging and photo of a CH4/air partially premixed laminar flame

    图  2  OH/CH2O激光器和OH/CH2O相机时序同步示意图

    Figure  2.  Schematic of the synchronization scheme for lasers and ICCD cameras used in simultaneous OH/CH2O PLIF measurements

    图  3  OH-PLIF扫谱和LIFBASE模拟结果。选取283.6nm附近的Q1(8)线为OH的激发波长。

    Figure  3.  An experimental excitation scan in the OH-PLIF measurement and a LIFBASE simulation. The Q1(8) line at~283.6nm was used to excite OH.

    图  4  不同时刻OH和CH2O的PLIF瞬时图像。(a)和(c)为OH-PLIF瞬时图像,(b)、(d)分别为与(a)、(c)同时获取的CH2O-PLIF瞬时图像。

    Figure  4.  Simultaneous OH/CH2O PLIF single-shot images. Typical single-shot OH-PLIF images are shown in (a) and (c), whereas single-shot CH2O-PLIF images recorded simultaneously with (a) and (c) are shown in (b) and (d), respectively.

    图  5  甲烷/空气层流对撞部分预混火焰组份分布(Φ=1.5)

    Figure  5.  Species distribution of a CH4/air partially premixed laminar counterflow flame (Φ=1.5): (a) distribution of CH4, O2, H2O, CO2, H2 and CO; (b) distribution of CH2O and OH. The signal intensity of CH2O in (b) is multiplied by 10.

    图  6  PLIF同时测量的OH和CH2O瞬时图像。(a)和(c)为OH-PLIF瞬时图像,(b)、(d)分别为与(a)、(c)同时获取的CH2O-PLIF瞬时图像。

    Figure  6.  Simultaneous OH/CH2O PLIF single-shot images. Typical single-shot OH-PLIF images are shown in (a) and (c), whereas single-shot CH2O-PLIF images recorded simultaneously with (a) and (c) are shown in (b) and (d), respectively.

    图  7  PLIF同时测量的OH和CH2O瞬时图像。(a)和(c)为典型的OH-PLIF瞬时图像,(b)、(d)分别为与(a)、(c)同时获取的CH2O-PLIF瞬时图像。

    Figure  7.  Simultaneous OH/CH2O PLIF single-shot images. Typical single-shot OH-PLIF images are shown in (a) and (c), whereas single-shot CH2O-PLIF images recorded simultaneously with (a) and (c) are shown in (b) and (d), respectively.

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出版历程
  • 收稿日期:  2016-01-30
  • 修回日期:  2016-05-22
  • 刊出日期:  2016-10-25

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