Match!

Can cool flames support quasi-steady alkane droplet burning?

Published on Dec 1, 2012in Combustion and Flame4.12
· DOI :10.1016/j.combustflame.2012.07.012
Vedha Nayagam13
Estimated H-index: 13
,
Daniel L. Dietrich13
Estimated H-index: 13
(Glenn Research Center)
+ 2 AuthorsForman A. Williams48
Estimated H-index: 48
(UCSD: University of California, San Diego)
Cite
Abstract
Abstract Experimental observations of anomalous combustion of n-heptane droplets burning in microgravity are reported. Following ignition, a relatively large n-heptane droplet first undergoes radiative extinction, that is, the visible flame ceases to exist because of radiant energy loss. But the droplet continues to experience vigorous vaporization for an extended period according to a quasi-steady droplet-burning law, ending in a secondary extinction at a finite droplet diameter, after which a vapor cloud rapidly appears surrounding the droplet. We hypothesize that the second-stage vaporization is sustained by low-temperature, soot-free, “cool-flame” chemical heat release. Measured droplet burning rates and extinction diameters are used to extract an effective heat release, overall activation energy, and pre-exponential factor for this low-temperature chemistry, and the values of the resulting parameters are found to be closer to those of “cool-flame” overall reaction-rate parameters, found in the literature, than to corresponding hot-flame parameters.
  • References (22)
  • Citations (67)
Cite
References22
Newest
#1Tom Bieleveld (UCSD: University of California, San Diego)H-Index: 1
#2Alessio Frassoldati (Polytechnic University of Milan)H-Index: 34
Last.K. Seshadri (UCSD: University of California, San Diego)H-Index: 28
view all 7 authors...
#1Alberto Cuoci (Polytechnic University of Milan)H-Index: 27
#2Marco Mehl (Polytechnic University of Milan)H-Index: 27
Last.E. Ranzi (Polytechnic University of Milan)H-Index: 7
view all 6 authors...
Last.Sunanda J. RamH-Index: 1
view all 3 authors...
#1A. Naidja (BNL: Brookhaven National Laboratory)H-Index: 1
#2C.R. Krishna (BNL: Brookhaven National Laboratory)H-Index: 3
Last.Devinder Mahajan (BNL: Brookhaven National Laboratory)H-Index: 20
view all 4 authors...
#1N. Peters (RWTH Aachen University)H-Index: 56
#2G. Paczko (RWTH Aachen University)H-Index: 4
Last.K. Seshadri (UCSD: University of California, San Diego)H-Index: 28
view all 4 authors...
Cited By67
Newest
#1Yiguang Ju (Princeton University)H-Index: 54
#2Christopher B. Reuter (Princeton University)H-Index: 7
Last.Sang Hee Won (USC: University of South Carolina)H-Index: 3
view all 5 authors...
#1V. V. Tyurenkova (RAS: Russian Academy of Sciences)H-Index: 8
#2V.V. Tyurenkova (RAS: Russian Academy of Sciences)
#1Mohammadhadi Hajilou (UW: University of Wyoming)H-Index: 2
#2Matthew Q. Brown (UW: University of Wyoming)
Last.Erica Belmont (UW: University of Wyoming)H-Index: 5
view all 4 authors...
#1Forman A. Williams (UCSD: University of California, San Diego)H-Index: 48
#2Vedha Nayagam (Case Western Reserve University)H-Index: 13
Last.Vedha Nayagam (Case Western Reserve University)H-Index: 4
view all 3 authors...
#1Yang Zhang (THU: Tsinghua University)H-Index: 11
#2Xiehe Yang (THU: Tsinghua University)
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 3
view all 6 authors...
#1Omar R. Yehia (Princeton University)H-Index: 2
#2Christopher B. Reuter (Princeton University)H-Index: 7
Last.Yiguang Ju (Princeton University)H-Index: 54
view all 3 authors...
#1Minhyeok Lee (UTokyo: University of Tokyo)H-Index: 2
#2Yong Fan (UTokyo: University of Tokyo)H-Index: 5
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 30
view all 5 authors...
#1Alex G. Novoselov (Princeton University)
#2Chung K. Law (Princeton University)H-Index: 77
Last.Michael E. Mueller (Princeton University)H-Index: 15
view all 3 authors...
View next paperMultistage oscillatory “Cool Flame” behavior for isolated alkane droplet combustion in elevated pressure microgravity condition