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http://dx.doi.org/10.6108/KSPE.2013.17.5.121

An Experimental Study on the Flame Dynamics in Ducted Combustor  

Jeong, Chanyeong (School of Mechanical and Aerospace Engineering, Seoul National University)
Kim, Taesung (School of Mechanical and Aerospace Engineering, Seoul National University)
Song, Jinkwan (School of Aerospace System, University of Cincinnati)
Yoon, Youngbin (School of Mechanical and Aerospace Engineering, Seoul National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.17, no.5, 2013 , pp. 121-131 More about this Journal
Abstract
The characteristics of flame dynamics occurring near the bluff body was experimentally investigated in a model combustor with V-gutter bluff body. Measurements of chemiluminescence with high speed camera and PIV were performed for visualization of flame structure. Flashback occurs due to the change of pressure gradient in the combustor, and the flashback distance depends on equivalent ratio. Unstable flames can be classified into three types depending on the flashback distance and structure. When the flame goes over the bluff body, an unusual flame structure occurs at the front of the bluff body. Re-stabilization takes place as the flame moves downstream of the combustor. This process is supported by a strong vortex structure behind the bluff body.
Keywords
V-gutter Bluff Body; Combustion Instability; Ducted Combustor; Flashback; Re-stabilization;
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