利用平面激光诱导荧光对旋流火焰OH自由基的定量研究

严浩; 张榛; 耿金越; 张少华; 余西龙

doi:10.7652/xjtuxb202302004

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利用平面激光诱导荧光对旋流火焰OH自由基的定量研究

专题新型燃料与燃烧过程优化 | 更新时间：2025-07-09

- 利用平面激光诱导荧光对旋流火焰OH自由基的定量研究
- Quantitative Investigation of OH Radical in Swirling Flame by Planar Laser-Induced Fluorescence
- 西安交通大学学报 2023年57卷第2期页码：31-38
- 作者机构：
  
  1. 北京控制工程研究所,北京,100190
  2. 北京市高效能及绿色宇航推进工程技术中心,北京,100190
  3. 中国科学院力学研究所,北京,100190
- 作者简介：
  
  : 2022-05-25。作者简介: 严浩(1988—),男,工程师
  张少华(通信作者),女,副研究员。基金项目: 国家自然科学基金资助项目(U1837211)。
- 基金信息：
  
  : 2022-05-25。作者简介: 严浩(1988—),男,工程师;张少华(通信作者),女,副研究员。基金项目: 国家自然科学基金资助项目(U1837211)。
- DOI：10.7652/xjtuxb202302004
  中图分类号： TK437
- 网络首发：2023-02-10，
  
  纸质出版：2023
- 稿件说明：
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严浩, 张榛, 耿金越, 等. 利用平面激光诱导荧光对旋流火焰OH自由基的定量研究[J]. 西安交通大学学报, 2023,57(2):31-38.

YAN Hao, ZHANG Zhen, GENG Jinyue, et al. Quantitative Investigation of OH Radical in Swirling Flame by Planar Laser-Induced Fluorescence[J]. 2023, 57(2): 31-38.
严浩, 张榛, 耿金越, 等. 利用平面激光诱导荧光对旋流火焰OH自由基的定量研究[J]. 西安交通大学学报, 2023,57(2):31-38. DOI： 10.7652/xjtuxb202302004.

YAN Hao, ZHANG Zhen, GENG Jinyue, et al. Quantitative Investigation of OH Radical in Swirling Flame by Planar Laser-Induced Fluorescence[J]. 2023, 57(2): 31-38. DOI： 10.7652/xjtuxb202302004.

摘要

为了获取非稳定火焰中OH瞬态粒子数密度分布

提出了一种基于平面激光诱导荧光(PLIF)的免标定OH定量测量方法。该方法采用双向激光的实验设置采集OH荧光图像

以获得激光沿程衰减的信息。提出了一种递归结构的算法并提取了激光的吸收系数分布

极大降低了现有数据处理方法对光路准直精度和图像信噪比的苛刻要求。通过该方法对航空发动机旋流燃烧室模型的非预混贫燃火焰进行了研究

得到OH自由基的瞬态空间分布。实验结果表明:随着燃烧室内的流量增大

火焰上游的氧燃混合程度增加

湍流对燃烧反应的干扰程度增大

火焰的结构也发生明显转变; 而在不同工况下

OH粒子数密度的最大值均在10

-3

量级。

Abstract

In order to obtain the transient concentration distribution of OH in unstable flame

a calibration-free OH quantitative measurement method based on PLIF is proposed in this paper. This method uses a bidirectional laser set-up to acquire OH fluorescence images containing information about laser depletion along the path. A recursive structure algorithm is proposed to extract the absorption coefficient distribution of the laser

which greatly reduces the stringent requirements of existing data processing methods on optical alignment accuracy and image signal-to-noise ratio. With this method

a study on non-premixed lean-fuel flame of aeroengine swirl combustor model is carrie

d out

and the transient spatial distribution of OH radical is obtained. The results show that as the flow rate increases in the combustion chamber

the oxygen-fuel mixing degree in the upstream of the flame and the disturbance degree of turbulence on the combustion reaction increase too

and the flame structure also changes significantly. However

the peak concentration of OH is on the order of 10

-3

at those tested operation points.

关键词

Keywords

references

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