Study on the Formation Processes of Polycyclic Aromatic Hydrocarbon in a Fuel Spray Flame via Excitation Emission Matrix spectroscopy

激发发射矩阵光谱研究燃料喷雾火焰中多环芳烃的形成过程

• 批准号: 14350103
• 负责人: KOSAKA Hidenori
• 金额: $ 8.32万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14350103/
• 关键词: Fuel Spray Flame; Soot Formation Processes; Polycyclic Aromatic Hydrocarbons(PAHs); Soot Precursors; Excitation Emission Matrix(EEM); Shock Tube; High Temp.and High Pres.Conditions; Multiwavelenghts Laser; すす前駆物; 多色レーザー

In order to investigate the formation processes of the polycyclic aromatic hydrocarbons (PAHs) which are considered as soot precursors in a spray flame, Excitation Emission Matrix (EEM) spectroscopy which can be applied to the transient fuel spray at high temperature and high pressure was developed. The latter half of this study, the laser-induced fluorescence spectroscopy and 2-S imaging were applied to the spray flame in a rapid compression machine. The summary of the obtained results are followings(1)The stronger emission was observed in the incident side of the spray flame in the case of excitation by 226 nm wavelength than that in the case of 355 nm excitation. This indicates that the more kinds of species are excited and emit the fluorescence in the case of 266 nm excitation than that of 355 nm excitation.(2)In the case of 335 nm excitation, the LIF from formaldehyde formed in the low temperature oxidation process of fuel was detected before the hot ignition, this LIF from formaldehyde disappears rapidly and the LIF from PAHs are appears immediately after the hot ignition. In the case of 266 nm excitation, the LIF from formaldehyde was not detected before the hot ignition, but the LIF from impurities in fuel was observed. After the hot ignition, the strong LIF from PAHs appears which has the same spectrum as the case of 355 nm excitation.(3)In the both cases of 266 nm and 355 excitations, the LIF from PAHs can be observed in the central region of a spray flame between 35 mm and 45 mm from the nozzle orifice after the hot ignition. At the 55 mm from the nozzle orifice, the LII from soot particles is overlapped to the LIF from PAHs.

为了研究多环芳烃（PAHS）的形成过程，被认为是喷雾火焰中的烟灰前体，开发了激发发射矩阵（EEM）光谱，可以在高温和高压下将其应用于瞬态燃料喷雾。在这项研究的后半部分，激光诱导的荧光光谱和2-S成像被应用于快速压缩机中的喷雾火焰。所获得的结果的摘要如下（1）在激发的情况下，在226 nm波长的情况下，在喷雾火焰的事件侧观察到比在355 nm激发的情况下观察到更强的发射。这表明，在266 nm激发的情况下，比355 nm激发的荧光更令人兴奋，并发出荧光。（2）在335 nm激发的情况下，在燃料点火之前发现了燃料迅速消失的燃料氧化过程，在燃料迅速消失的情况下，在低温氧化过程中形成的formaldehyde的LIF被发现了prefts five fiels fifs fifs fif shote yef inf inf inf inf inf fif。在266 nm激发的情况下，在热点火之前未检测到甲醛的LIF，但是观察到燃料中的杂质的LIF。热火点火后，PAH的强烈LIF出现与355 nm激发的情况相同。（3）在两种情况下，在266 nm和355个激发的情况下，可以在火热点火孔口35 mm和45 mm之间的喷雾火焰中观察到PAHS的LIF。在距喷嘴孔口55毫米的情况下，来自烟灰颗粒的LII从PAHS重叠到LIF。

项目成果

Aizawa, T., Kosaka, H., Matsui, Y.: "2-D Imaging of Soot Formation Process in a Transient Spray Flame by Laser-Induced Fluorescence and Incandescence Techniques"SAE Technical paper. No.2002-01-2669. 1-9 (2002)

Aizawa, T.、Kosaka, H.、Matsui, Y.：“通过激光诱导荧光和白炽技术对瞬态喷雾火焰中烟灰形成过程进行二维成像”SAE 技术论文。

相澤哲哉, 小酒英範, 松井幸雄: "多波長レーザ光源を用いた火炎内多環芳香族炭化水素の励起発光マトリクス(EEM)の測定"日本機械学会論文集(B編). 70・690. 496-502 (2003)

Tetsuya Aizawa、Hidenori Kozake、Yukio Matsui：“使用多波长激光光源测量火焰中多环芳香烃的激发发射矩阵（EEM）”日本机械工程师学会会刊（编辑B）。 690. 496-502 (2003)

相澤哲哉, 小酒英範, 松井幸雄: "レーザー誘起蛍光・赤熱法による非定常噴霧火炎内すす生成過程の2次元可視化"日本機械学会論文集(B編). 69・680. 981-987 (2003)

Tetsuya Aizawa、Hidenori Kozake、Yukio Matsui：“使用激光诱导荧光和白炽光方法对不稳定喷雾火焰中烟灰形成过程的二维可视化”日本机械工程师学会会刊（编辑 B）。 981-987（2003）

Aizawa, T., Imaichi, Kosaka, H., Matsui, Y.: "Measurement of Excitation-Emission Matrix of Shock Heated PAHs using a Multi-Wavelength Laser Source"SAE Technical paper. No.2003-01-1785. 1-10 (2003)

Aizawa, T.、Imaichi、Kosaka, H.、Matsui, Y.：“使用多波长激光源测量冲击加热 PAH 的激发-发射矩阵”SAE 技术论文。

Aizawa, T., Kosaka, H., Matsui, Y.: "2-D Imaging of Soot Formation Process in a Transient Spray Flame by Laser-Induced Fluorescence and Incandescence Techniques"SAE Technical paper. 2002-01-2669. 1-9 (2002)

Aizawa, T.、Kosaka, H.、Matsui, Y.：“通过激光诱导荧光和白炽技术对瞬态喷雾火焰中烟灰形成过程进行二维成像”SAE 技术论文。