TY - JOUR
T1 - Absolute radical concentration measurements in low-pressure H2/O2 flames during the combustion of graphite
AU - Bohm, T.
AU - Ditzian, N.
AU - Peiter, G.
AU - Volpp, H. R.
AU - Cheskis, S.
AU - Wolfrum, J.
PY - 2005
Y1 - 2005
N2 - Absolute CN and CH radical concentrations were determined in situ during the combustion of a graphite substrate in premixed, laminar, low-pressure, H2/O2 flames for two different equivalence ratios, φ = 1 and φ = 1.5. For CN measurements, a small amount of NO (1.8%) was added. The graphite substrate reduced the flame temperature in the vicinity of its surface. The CN concentrations were three times higher for the rich flame than for the stoichiometric flame. CH concentrations were slightly higher for the stoichiometric flame than for the rich flame. The observed CH/CN concentration ratio was substantially lower compared to NO-doped low-pressure CH4/O2 flames. The obtained quantitative information could serve as a first calibration point for detailed numerical simulations of the burning solid graphite, which are based on the concept of surface elementary reactions. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).
AB - Absolute CN and CH radical concentrations were determined in situ during the combustion of a graphite substrate in premixed, laminar, low-pressure, H2/O2 flames for two different equivalence ratios, φ = 1 and φ = 1.5. For CN measurements, a small amount of NO (1.8%) was added. The graphite substrate reduced the flame temperature in the vicinity of its surface. The CN concentrations were three times higher for the rich flame than for the stoichiometric flame. CH concentrations were slightly higher for the stoichiometric flame than for the rich flame. The observed CH/CN concentration ratio was substantially lower compared to NO-doped low-pressure CH4/O2 flames. The obtained quantitative information could serve as a first calibration point for detailed numerical simulations of the burning solid graphite, which are based on the concept of surface elementary reactions. This is an abstract of a paper presented at the 30th International Symposium on Combustion (Chicago, IL 7/25-30/2004).
KW - Diagnostic methods: spectroscopic, laser
KW - Flames: laminar, premixed
KW - Heterogeneous combustion
UR - http://www.scopus.com/inward/record.url?scp=33750723851&partnerID=8YFLogxK
U2 - 10.1016/j.proci.2004.08.002
DO - 10.1016/j.proci.2004.08.002
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AN - SCOPUS:33750723851
SN - 1540-7489
VL - 30 II
SP - 2131
EP - 2139
JO - Proceedings of the Combustion Institute
JF - Proceedings of the Combustion Institute
IS - 2
T2 - 30th International Symposium on Combustion
Y2 - 25 July 2004 through 30 July 2004
ER -