Detailed investigation of OH-LIF spectrum in methane/air flame

Guohua Li; Jingfeng Ye; Zhenrong Zhang; Zhiyun Hu

doi:10.1117/12.2011127

16 May 2013 Detailed investigation of OH-LIF spectrum in methane/air flame

Guohua Li, Jingfeng Ye, Zhenrong Zhang, Zhiyun Hu

Proceedings Volume 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012); 87961C (2013) https://doi.org/10.1117/12.2011127
Event: 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 2012, Xi'an, Shaanxi, China

Abstract

Laser induced fluorescence has the potential to get two dimension temperature and concentration map in combustion. For understanding the fluorescence technology exactly, A detailed experiment has been developed to investigate the fluorescence spectrum. The time variation of spectrum is first presented by changing the pump-probe time delay. And this is followed by demonstrate the response of fluorescence to laser excitation. As showed by the experiment result, The intensity ratio of the (1, 1) and (0, 0) fluorescence band was varied both with time and the exiting laser line, we attribute this phenomenon to the difference rotational distribution of excited OH. And the new rule, which exciting a specific rotational level in the A²Σ(υ ' =1) excited state from two difference rotational levels in the X ²Π(υ " = 0) ground state, was experimental confirmed, and this will be a foundation to the future two line laser induced fluorescence thermometry.

Citation Download Citation

Guohua Li, Jingfeng Ye, Zhenrong Zhang, and Zhiyun Hu "Detailed investigation of OH-LIF spectrum in methane/air flame", Proc. SPIE 8796, 2nd International Symposium on Laser Interaction with Matter (LIMIS 2012), 87961C (16 May 2013); https://doi.org/10.1117/12.2011127

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KEYWORDS

Luminescence

Laser induced fluorescence

Thermometry

Combustion

Energy transfer

Imaging systems

Molecules

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