Study of OH radicals’ spontaneous radiation of counterflow diffusion flame under non-equilibrium plasma

Lan Li; Yukun Zhang

doi:10.1117/12.2522094

29 March 2019 Study of OH radicals’ spontaneous radiation of counterflow diffusion flame under non-equilibrium plasma

Lan Li, Yukun Zhang

Proceedings Volume 11046, Fifth International Symposium on Laser Interaction with Matter; 110460R (2019) https://doi.org/10.1117/12.2522094
Event: Fifth International Symposium on Laser Interaction with Matter, 2018, Changsha, China

Abstract

Plasma assisting technique has shown great prospect in various combustion environments. Especially in terrible combustion problems, plasma brings heat effects, chemical kinetic effects, or transport effects to influence combustion. Fundamental research of non-equilibrium plasma assisting combustion is prerequisite for its engineering application. Counterflow burner provides an ideal and favourable platform to investigate aforementioned problems. This article integrated non-equilibrium plasma discharge system and counterflow burner to investigate influence of coaxial double air gap dielectric barrier discharge on counterflow diffusion flame. OH radicals generation and radiation were observed to reveal basic chemical kinetic mechanisms of plasma. Ultraviolet intensified ICCD camera was used to record OH radicals’ spontaneous radiation in flame sheet. Radiation images show that plasma discharge would increase intensity of OH radicals’ radiation and combustion of flat flame when discharge voltage was under certain value; when discharge voltage exceeded the certain value, airflow in burner would be inevitably affected by discharge, and uniformity of OH radicals’ radiation declined, while in the central zone, flow speed increased, thermal loss decreased and combustion-assistant effects weakened.

Citation Download Citation

Lan Li and Yukun Zhang "Study of OH radicals’ spontaneous radiation of counterflow diffusion flame under non-equilibrium plasma", Proc. SPIE 11046, Fifth International Symposium on Laser Interaction with Matter, 110460R (29 March 2019); https://doi.org/10.1117/12.2522094

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KEYWORDS

Plasma

Combustion

Diffusion

Copper

Dielectrics

Plasma systems

Cooling systems

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