TY - JOUR
T1 - Combustion dynamics of plasma-enhanced premixed and nonpremixed flames
AU - Rao, Xing
AU - Hammack, Steve
AU - Lee, Tonghun
AU - Carter, Campbell
AU - Matveev, Igor B.
N1 - Funding Information:
Manuscript received August 17, 2010; revised September 20, 2010; accepted October 5, 2010. Date of current version December 10, 2010. This work was supported by AFOSR under reward FA9550-09-1-0282 and FA9550-10-1-0556. X. Rao, S. Hammack, and T. Lee are with Michigan State University, East Lansing, MI 48824 USA. C. Carter is with the Air Force Research Laboratory, Wright–Patterson AFB, OH 45433 USA. I. B. Matveev is with Applied Plasma Technologies, McLean, VA 22101 USA. Color versions of one or more of the figures in this paper are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/TPS.2010.2087041
PY - 2010/12
Y1 - 2010/12
N2 - Combustion dynamics are investigated for plasma-enhanced methaneair flames in premixed and nonpremixed configurations using a transient arc dc plasmatron. Planar laser-induced fluorescence images of hydroxyl (OH) and carbon monoxide (CO) radicals are obtained over a range of equivalence ratios ($ \phi = 0.7 {-} 1.3$), flow rates (618 LPM), and plasma powers (100900 mA) to monitor radical propagation and in situ fuel reforming. The flow rates presented here are outside the range of normal flame stability. In the nonpremixed mode, the fuel is injected separately as a coflow around the plasma discharge, resulting in a unique two-cone flame front geometry, and the flame stability is mainly dependent on the flow dynamics. For premixed flames, partial oxidation occurs inside the chamber, resulting in higher energy conversion efficiencies, and stability is shown to be sensitive to the combustion chemistry. Both configurations are significantly influenced by in situ fuel reforming at higher plasma powers.
AB - Combustion dynamics are investigated for plasma-enhanced methaneair flames in premixed and nonpremixed configurations using a transient arc dc plasmatron. Planar laser-induced fluorescence images of hydroxyl (OH) and carbon monoxide (CO) radicals are obtained over a range of equivalence ratios ($ \phi = 0.7 {-} 1.3$), flow rates (618 LPM), and plasma powers (100900 mA) to monitor radical propagation and in situ fuel reforming. The flow rates presented here are outside the range of normal flame stability. In the nonpremixed mode, the fuel is injected separately as a coflow around the plasma discharge, resulting in a unique two-cone flame front geometry, and the flame stability is mainly dependent on the flow dynamics. For premixed flames, partial oxidation occurs inside the chamber, resulting in higher energy conversion efficiencies, and stability is shown to be sensitive to the combustion chemistry. Both configurations are significantly influenced by in situ fuel reforming at higher plasma powers.
KW - Carbon monoxide
KW - fuel reforming
KW - hydroxyl
KW - laser induced fluorescence
KW - plasma assisted combustion
KW - premixed and nonpremixed flame
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U2 - 10.1109/TPS.2010.2087041
DO - 10.1109/TPS.2010.2087041
M3 - Article
AN - SCOPUS:78650274280
SN - 0093-3813
VL - 38
SP - 3265
EP - 3271
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
IS - 12 PART 1
M1 - 5624645
ER -