Experimental study on the flame behaviors of premixed methane/air mixture in horizontal rectangular ducts

Dongliang Chen; Jinhua Sun; Sining Chen; Yi Liu; Guanquan Chu

doi:10.1117/12.725361

29 January 2007 Experimental study on the flame behaviors of premixed methane/air mixture in horizontal rectangular ducts

Dongliang Chen, Jinhua Sun, Sining Chen, Yi Liu, Guanquan Chu

Author Affiliations +

Proceedings Volume 6279, 27th International Congress on High-Speed Photography and Photonics; 627943 (2007) https://doi.org/10.1117/12.725361
Event: 27th International congress on High-Speed Photography and Photonics, 2006, Xi'an, China

Abstract

In order to explore the flame propagation characteristics and tulip flame formation mechanism of premixed methane/air mixture in horizontal rectangular ducts, the techniques of Schlieren and high-speed video camera are used to study the flame behaviors of the premixed gases in a closed duct and opened one respectively, and the propagation characteristics in both cases and the formation mechanism of the tulip flame are analyzed. The results show that, the propagation flame in a closed duct is prior to form a tulip flame structure than that in an opened duct, and the tulip flame structure formation in a closed duct is related to the flame propagation velocity decrease. The sharp decrease of the flame propagation velocity is one of the reasons to the tulip flame formation, and the decrease of the flame propagation velocity is due to the decrease of the burned product flow velocity mainly.

Citation Download Citation

Dongliang Chen, Jinhua Sun, Sining Chen, Yi Liu, and Guanquan Chu "Experimental study on the flame behaviors of premixed methane/air mixture in horizontal rectangular ducts", Proc. SPIE 6279, 27th International Congress on High-Speed Photography and Photonics, 627943 (29 January 2007); https://doi.org/10.1117/12.725361

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