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Articles

Experimental Study on Cellular Premixed Propane Flames in a Narrow Gap between Parallel Plates

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Pages 1256-1275 | Received 18 Jun 2018, Accepted 05 Sep 2018, Published online: 10 Oct 2018
 

ABSTRACT

Experimental results on laminar propane flames propagating in a narrow gap between parallel glass plates are presented. Development and evolution of cellular flame structure is demonstrated by video and long-exposure photo recordings for stoichiometric and fuel-rich mixtures with equivalence ratio of 1.0:1.25. It is shown that in narrow gaps the lateral cell sizes by far exceed the gap width. Average flame propagation speed obtained for gap widths between 2.5 and 4.4 mm is shown to depend significantly on the gap width due to the effect of heat losses on the normal flame speed, as well as due to cooling of products behind the flame. Effect of gap width on the cellular structure is demonstrated, and statistical characteristics of the cells are obtained for two gap widths. Flame propagation patterns are also obtained for non-central ignition performed at one or simultaneously at two points.

Additional information

Funding

This research was supported by Russian Foundation for Basic Research, [Grant No. 1601-00557].

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