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Experimental study of the dynamics and structure of self-sustaining premixed cool flames using a counterflow burner

Published on Apr 1, 2016in Combustion and Flame4.12
· DOI :10.1016/j.combustflame.2016.01.008
Christopher B. Reuter7
Estimated H-index: 7
(Princeton University),
Sang Hee Won27
Estimated H-index: 27
(Princeton University),
Yiguang Ju54
Estimated H-index: 54
(Princeton University)
Abstract
Abstract Self-sustaining premixed cool flames are successfully stabilized in a dimethyl ether/oxygen counterflow burner through ozone addition, creating a new platform for the quantitative measurement of cool flame extinction limits, ignition limits, and structure as well as the validation of low-temperature chemical kinetic models. First, results show that stable premixed cool flames can exist over a broad region of equivalence ratios and strain rates, which allows for the ignition and extinction limits of both cool flames and hot flames to be measured at a variety of conditions. It is seen that at low fuel concentrations the cool flame extinction limit surpasses the hot flame extinction limit, providing experimental validation to previous numerical predictions. Furthermore, the experiments demonstrate that the cool flame speed's dependence on equivalence ratio is far weaker than that of near-limit hot flames. It is also found that a hysteresis exists between cool flames and hot flames near the hot flame extinction limit at low fuel concentrations. The examination of cool flame structure through planar laser-induced fluorescence reveals that the CH 2 O profile of the premixed cool flame is much thicker than its hot flame counterpart at the same fuel concentration, confirming the importance of CH 2 O as an important cool flame product. Numerical calculations based on a detailed chemical kinetic model are able to capture these various trends and show good qualitative agreement with the experimental results. The present experiments provide a new method to study premixed cool flames in a laboratory setting and to advance the fundamental understanding of low-temperature chemistry and near-limit flame dynamics.
  • References (37)
  • Citations (27)
References37
Newest
#1Peng Zhao (Princeton University)H-Index: 10
#2Wenkai Liang (Princeton University)H-Index: 8
Last.Chung K. Law (Princeton University)H-Index: 77
view all 4 authors...
#1Yiguang Ju (Princeton University)H-Index: 54
#2Christopher B. Reuter (Princeton University)H-Index: 7
Last.Sang Hee Won (Princeton University)H-Index: 27
view all 3 authors...
#1Vedha Nayagam (Case Western Reserve University)H-Index: 4
#2Daniel L. Dietrich (Glenn Research Center)H-Index: 13
Last.Forman A. Williams (UCSD: University of California, San Diego)H-Index: 48
view all 4 authors...
#1Ulrich Niemann (UCSD: University of California, San Diego)H-Index: 12
#2K. Seshadri (UCSD: University of California, San Diego)H-Index: 28
Last.Forman A. Williams (UCSD: University of California, San Diego)H-Index: 48
view all 3 authors...
#1Shogo Kikui (Tohoku University)H-Index: 2
#2Taiki Kamada (Tohoku University)H-Index: 2
Last.Kaoru Maruta (Tohoku University)H-Index: 34
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#1Sang Hee Won (Princeton University)H-Index: 27
#2Bo Jiang (NUAA: Nanjing University of Aeronautics and Astronautics)H-Index: 3
Last.Yiguang Ju (Princeton University)H-Index: 54
view all 5 authors...
#1Tanvir Farouk (USC: University of South Carolina)H-Index: 17
#2Michael C. Hicks (Glenn Research Center)H-Index: 8
Last.Frederick L. Dryer (Princeton University)H-Index: 66
view all 3 authors...
#1Adam B. Dempsey (UW: University of Wisconsin-Madison)H-Index: 15
#2N. Ryan Walker (UW: University of Wisconsin-Madison)H-Index: 7
Last.Rolf D. Reitz (UW: University of Wisconsin-Madison)H-Index: 71
view all 4 authors...
Cited By27
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#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 0 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
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#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
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#1Wenting Sun (Georgia Institute of Technology)H-Index: 20
#2Xiang Gao (Georgia Institute of Technology)H-Index: 7
Last.Timothy Ombrello (AFRL: Air Force Research Laboratory)H-Index: 16
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#1Yang Zhang (THU: Tsinghua University)H-Index: 11
#2Xiehe Yang (THU: Tsinghua University)
Last.Junfu Lyu (THU: Tsinghua University)H-Index: 3
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#1Omar R. Yehia (Princeton University)H-Index: 2
#2Christopher B. Reuter (Princeton University)H-Index: 7
Last.Yiguang Ju (Princeton University)H-Index: 54
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#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
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#1Eric Lin (Princeton University)H-Index: 1
#2Christopher B. Reuter (Princeton University)H-Index: 7
Last.Yiguang Ju (Princeton University)H-Index: 54
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View next paperNumerical simulations of premixed cool flames of dimethyl ether/oxygen mixtures