Record Details

Experimental and numerical investigations of flame pattern formations in a radial microchannel

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Experimental and numerical investigations of flame pattern formations in a radial microchannel
 
Creator FAN, AIWU
MINAEV, SERGEY
SERESHCHENKO, EVGENIY
FURSENKO, ROMAN
SUDARSHAN KUMAR
LIU, WEI
MARUTA, KAORU
 
Subject flammability
methane
microchannels
model structures
arrhenius reaction
 
Description Flame pattern formations in a heated radial microchannel with a gap width of 1.75 mm were investigated experimentally and numerically. A premixed methane–air mixture was introduced at the center of microchannel formed by two parallel quartz discs which were heated with an external porous burner to create a positive temperature gradient condition in the direction of flow. In addition to conventional stable flames, some non-stationary flame patterns termed single- and double-pelton-like flames and the traveling flame were also observed. The double- and single-pelton-like flames occurred at a random possibility under certain conditions, which rotated around the center of the radial microchannel at a frequency of ~25–55 Hz. Regime diagram of all those flame patterns was drawn based on the experimental findings in the mixture equivalence ratio range of 0.65–1.30 and inlet mixture velocity range of 1.5–5.0 m/s. Meanwhile, the experimental results also qualitatively verify our previous theoretical prediction that is the S-shaped dependency of flame radial location on inlet velocity for stoichiometric mixture. Finally, numerical simulations using a global one-step Arrhenius reaction model successfully captured some rotating flame structures that may be associated with single- and double-pelton-like flames observed in the experiments.
 
Publisher Elsevier
 
Date 2009-09-12T08:08:31Z
2011-11-25T15:17:06Z
2011-12-26T13:04:34Z
2011-12-27T05:50:28Z
2009-09-12T08:08:31Z
2011-11-25T15:17:06Z
2011-12-26T13:04:34Z
2011-12-27T05:50:28Z
2009
 
Type Article
 
Identifier Proceedings of the Combustion Institute 32(2), 3059-3066
1540-7489
http://dx.doi.org/10.1016/j.proci.2008.06.092
http://hdl.handle.net/10054/1621
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1621
 
Language en