TY - JOUR
T1 - Intracavity laser absorption spectroscopy of sooting acetylene/air flames
AU - Goldman, A.
AU - Cheskis, S.
PY - 2008/8
Y1 - 2008/8
N2 - Intracavity laser absorption spectroscopy (ICLAS) is used to measure the absolute concentration profiles of HCO and C2 in low-pressure acetylene/oxygen/nitrogen flames with equivalence ratios ℓ=0.8, 1.0, 1.5, 2.0 and 2.5. The flames with ℓ=2.0 and 2.5 are soot-producing, with light extinction reaching 0.1% per pass in the flame with ℓ=2.5. This strong broadband extinction does not affect the sensitivity of ICLAS, however. The temperature profiles of the flames were measured using laser-induced fluorescence of the OH radicals. For C2 concentration measurements, the (0-2) vibronic transition of the $d3 Πg gets a3Πu Swan band is used. The lines of this transition are located close to the HCO lines, making it possible to measure the two radical concentrations simultaneously. The C2 concentration is highest in the ℓ=1.5 flame, and lower in the lean and heavily sooted ℓ=2.5 flames.
AB - Intracavity laser absorption spectroscopy (ICLAS) is used to measure the absolute concentration profiles of HCO and C2 in low-pressure acetylene/oxygen/nitrogen flames with equivalence ratios ℓ=0.8, 1.0, 1.5, 2.0 and 2.5. The flames with ℓ=2.0 and 2.5 are soot-producing, with light extinction reaching 0.1% per pass in the flame with ℓ=2.5. This strong broadband extinction does not affect the sensitivity of ICLAS, however. The temperature profiles of the flames were measured using laser-induced fluorescence of the OH radicals. For C2 concentration measurements, the (0-2) vibronic transition of the $d3 Πg gets a3Πu Swan band is used. The lines of this transition are located close to the HCO lines, making it possible to measure the two radical concentrations simultaneously. The C2 concentration is highest in the ℓ=1.5 flame, and lower in the lean and heavily sooted ℓ=2.5 flames.
UR - http://www.scopus.com/inward/record.url?scp=47749083054&partnerID=8YFLogxK
U2 - 10.1007/s00340-008-3084-5
DO - 10.1007/s00340-008-3084-5
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AN - SCOPUS:47749083054
SN - 0946-2171
VL - 92
SP - 281
EP - 286
JO - Applied Physics B: Lasers and Optics
JF - Applied Physics B: Lasers and Optics
IS - 2
ER -