TY - JOUR
T1 - More on minimum ignition energy transition for lean premixed turbulent methane combustion in flamelet and distributed regimes
AU - Shy, S. S.
AU - Shih, W. T.
AU - Liu, C. C.
N1 - Funding Information:
Received 5 September 2007; accepted 18 February 2008. This manuscript was orally presented at 21st ICDERS, Poitiers, France on July 23–27, 2007. The authors would like to thank the National Science Council, Taiwan for her continuous financial supports (NSC 94-ET-7-008-008-ET, 94-2212-E-008-021, 95-2218-E-008-018 and 96-2218-E-008-004). Address correspondence to S. S. Shy, Department of Mechanical Engineering, National Central University, Jhong-li City, Tao-yuan 32001, Taiwan. E-mail: [email protected]
PY - 2008/10
Y1 - 2008/10
N2 - At the 31st Combustion Symposium, Shy et al. found a transition on minimum ignition energy (MIE) of methane-air mixtures at the equivalence ratio =0.6 in intense isotropic turbulence, where ignition energies of a spark-electrode was quantitatively measured by an energy-adjustable high-power pulse ignition system. Using the same methodology, this paper presents for the first time two new MIE data sets at =0.7 and 0.8 over a wide range of turbulent intensities. It is found that MIE transition due to different modes of turbulent combustion depends on a turbulent Karlovitz number (Ka) indicating the time ratio between chemical reaction and turbulence, for which MIE first increases gradually with Ka and then increases drastically when KaKac49 depending also on . The effect of the electrode gap on ignition energies and turbulence influence to centrally-ignited, outwardly propagating flames are also discussed.
AB - At the 31st Combustion Symposium, Shy et al. found a transition on minimum ignition energy (MIE) of methane-air mixtures at the equivalence ratio =0.6 in intense isotropic turbulence, where ignition energies of a spark-electrode was quantitatively measured by an energy-adjustable high-power pulse ignition system. Using the same methodology, this paper presents for the first time two new MIE data sets at =0.7 and 0.8 over a wide range of turbulent intensities. It is found that MIE transition due to different modes of turbulent combustion depends on a turbulent Karlovitz number (Ka) indicating the time ratio between chemical reaction and turbulence, for which MIE first increases gradually with Ka and then increases drastically when KaKac49 depending also on . The effect of the electrode gap on ignition energies and turbulence influence to centrally-ignited, outwardly propagating flames are also discussed.
KW - Flamelet and distributed regimes
KW - Ignition transition
KW - Lean premixed turbulent combustion
KW - Minimum ignition energy
UR - http://www.scopus.com/inward/record.url?scp=53349116875&partnerID=8YFLogxK
U2 - 10.1080/00102200802258114
DO - 10.1080/00102200802258114
M3 - 期刊論文
AN - SCOPUS:53349116875
SN - 0010-2202
VL - 180
SP - 1735
EP - 1747
JO - Combustion Science and Technology
JF - Combustion Science and Technology
IS - 10-11
ER -
