基于激光诱导炽光法进行碳烟测量的研究进展

刘福水; 花阳; 吴晗; 高永利; 吴昊

doi:10.11729/syltlx20160104

基于激光诱导炽光法进行碳烟测量的研究进展

doi: 10.11729/syltlx20160104

北京理工大学机械与车辆学院, 北京 100081

详细信息

作者简介:
刘福水(1964-)，男，河北衡水人，教授, 博士生导师。研究方向: 内燃机总体设计、燃烧与仿真、氢能源动力等。通信地址：北京市海淀区北京理工大学机械与车辆学院(100081)。E-mail: fushui_liu@bit.edu.cn

通讯作者:
E-mail: huayanghenan@163.com

中图分类号: TK421
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- 文章访问数: 251
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- 被引次数: 0
出版历程
- 收稿日期: 2016-06-27
- 修回日期: 2016-08-05
- 刊出日期: 2017-02-25

Research progress on soot measurement by laser induced incandescence

School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 激光诱导炽光法（Laser Induced Incandesence，LⅡ）是一种非接触式的光学诊断方法，可获得激光片光照射薄层内瞬时碳烟的二维分布，具有较高的时间与空间分辨率，已经成为一种重要的碳烟测量技术。本文首先介绍了LⅡ技术的发展历程和基本原理，然后从数值模拟、定性和定量测量3个方面详细综述了LⅡ用于碳烟测量的技术方法以及国内外的研究进展，并对今后的发展提出了建议。实现定量测量的标定方法主要有采样法、LⅡ结合消光法（Light Extinction Method，LEM）和双色法LⅡ（2-Color Laser Induced Incandesence，2C-LⅡ），其中2C-LⅡ因实现相对简单，可以在线实时标定，因此在国内外获得了较大的发展。本文通过总结国内外LⅡ技术在测量碳烟方面的研究成果，希望让国内同行了解该方法的研究现状以及该方法在揭示碳烟生成氧化机理方面的重要作用，为其今后的发展提供一些参考。
- 激光诱导炽光法 (LII) /
- 碳烟 /
- 定量测量 /
- 光学诊断 /
- 研究进展
Abstract: Laser induced incandescence is a non-contact optical diagnosis method. With this method, we can obtain the two-dimensional spatial distribution of instantaneous soot within the thin layer of incoming sheet laser. This method has become an important measurement technology of soot due to its high spatial and temporal resolution. This paper first introduces the development of LⅡ technology and basic theory. Then the technical methods of LⅡ and research progress at home and abroad are summarized detailedly from three aspects, that numerical simulation, qualitative and quantitative measurement. The LⅡ mathematical model mainly includes Melton model, Liu model and Michelsen model. These models can be used to predict the change rule of LⅡ signal and also lay a foundation for the test of soot particle size. To realize quantitative measurement, the calibration of LⅡ signal is necessary. This is also one of the difficulties in LⅡ measurement. There are mainly three methods for calibration, that are sampling technique, light extinction method (LEM) and 2-color laser induced incandescence (2C-LⅡ). The sampling technique is less used because it will disturb the combustion process and mix impurities. The LⅡ-LEM needs two laser systems and uses the measuring result of LEM to calibrate the LⅡ signal, so its operation is complicated. Nevertheless, 2C-LⅡ does not need other measurement technology and can realize online real-time calibration. Since this method is relatively simple, it develops rapidly and has achieved many significant results. Naturally, LⅡ technology still needs improvement, such as optimizing the incident laser wavelength and energy, controlling the uniformity of laser sheet, perfecting the LⅡ mathematical model, and extending the application in complex environment. Through summarizing the research achievements of LⅡ technology, this paper aims to emphasize the research status and the importance of this method in understanding the soot formation and oxidation mechanism, and providing some references for its future development.
- laser induced incandescence /
- soot /
- quantitative measurement /
- optical diagnosis /
- research progress

HTML全文

图 1 碳烟粒子能量平衡示意图

Figure 1. Energy balance schematic of soot particle

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图 2 实验装置示意图

Figure 2. Schematic diagram of experimental set-up

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图 3 LII-LIF测试系统示意图

Figure 3. Schematic diagram of LII-LIF test system

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图 4 不同燃料碳烟体积分数分布

Figure 4. Soot volume fraction distribution of different fuels

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图 5 高温高压环境下LII-LEM测试系统示意图

Figure 5. Schematic diagram of LII-LEM measurement system in a high pressure and high temperature environment

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图 6 实验装置示意图

Figure 6. Schematic diagram of experimental set-up

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图 7 火焰内碳烟体积分数分布

Figure 7. Soot volume fraction distribution in flame

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图 8 实验系统示意图

Figure 8. Schematic diagram of experimental system

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图 9 不同燃料碳烟体积分数分布

Figure 9. Soot volume fraction distribution of different fuels

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图 10 不同曲轴转角时缸内炽光分布

Figure 10. Incandescence distribution in cylinder at different crank angles

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图 11 不同喷油压力下碳烟体积分数的二维分布

Figure 11. Soot volume fraction distribution under different injection pressure

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图 12 不同火焰轴线高度下的碳烟粒径

Figure 12. Soot particle diameter at different heights of flame axis

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图 13 CO₂不同掺混比下的碳烟体积分数

Figure 13. Soot volume fraction with different blending ratios of CO₂

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图 14 碳烟粒径分布范围

Figure 14. Distribution range of soot particle diameter

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图 15 醇类结构对碳烟浓度的统计结果

Figure 15. Accumulation of soot concentration with different alcohol structures

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图 16 醇类结构粒径分布的影响

Figure 16. Soot particle diameterdistribution with different alcohol structures

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