Experimental study on CH-PLIF imaging of swirling flame

Qingfeng Che; Hualei Zhang; Linsen Wang; Meng Li; Guozhu Chen; Xinhua Qi; Shuang Chen

doi:10.1117/12.2666701

4 April 2023 Experimental study on CH-PLIF imaging of swirling flame

Qingfeng Che, Hualei Zhang, Linsen Wang, Meng Li, Guozhu Chen, Xinhua Qi, Shuang Chen

Proceedings Volume 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications; 126176C (2023) https://doi.org/10.1117/12.2666701
Event: 9th Symposium on Novel Photoelectronic Detection Technology and Applications (NDTA 2022), 2022, Hefei, China

Abstract

The imaging experiment of Methylidyne (CH) radical generated from methane combustion on a swirl burner was carried out using Planar Laser Induced Fluorescence technology (PLIF), and the C-X (0,0) band was selected as the excitation method. The laser wavelength and laser energy have a significant impact on the signal strength and signal-to-noise ratio of CH radical, and the imaging quality of CH reached the best with the laser wavelength and energy are of 314.415 nm and 0.3 mJ. The fluorescence signal of CH radical from swirling flame mainly distributed on the outside of the image and exists in a narrow area. As the of equivalence ratio of methane combustion increased, the signal of CH radical gradually strengthened, and the flame profile of chemiluminescence gradually evolved from "V" type to "M" type, and the number of vortices formed by CH radical from PLIF imaging gradually increased.

Citation Download Citation

Qingfeng Che, Hualei Zhang, Linsen Wang, Meng Li, Guozhu Chen, Xinhua Qi, and Shuang Chen "Experimental study on CH-PLIF imaging of swirling flame", Proc. SPIE 12617, Ninth Symposium on Novel Photoelectronic Detection Technology and Applications, 126176C (4 April 2023); https://doi.org/10.1117/12.2666701

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