Local temporally-resolved measurements of chemiluminescent intensity from OH∗, CH∗ and C∗2 radicals were obtained in premixed counterflow flames operating with propane and prevaporised fuels (isooctane, ethanol and methanol), for different equivalence ratios and strain rates. The results quantified independently the effects of fuel type, strain rate and equivalence ratio on chemiluminescent emissions from flames. The ability of chemiluminescent intensity from OH∗, CH∗ and C∗2 radicals to indicate heat release rate depends strongly on fuel type. The intensity ratio OH∗/CH∗ has a monotonic decrease with equivalence ratio for all fuels and can be used to measure equivalence ratio of the reacting mixture. For propane and isooctane, the OH∗/CH∗ ratio remains independent of flame strain rate, whereas some dependence is observed for ethanol and methanol.
Des mesures locales et résolues en temps de l'intensité de chimiluminescence des radicaux OH∗, CH∗ et C∗2 ont été réalisées dans des flammes à contre-courant alimentées par du propane ou des combustibles prévaporisés (isooctane, éthanol, méthanol) pour différents taux d'étirement et différentes richesses. Les résultats quantifient indépendamment l'influence du combustible, du taux d'étirement et de la richesse sur les émissions de chimiluminescence des flammes. La capacité de l'intensité de chimiluminescence à décrire le taux de dégagement de chaleur dépend fortement de la nature du combustible. Le rapport d'intensité OH∗/CH∗ décroit de façon monotone avec la richesse pour tous les combustibles et peut être utilisé pour mesurer la richesse du mélange réactif. Pour le propane et l'isooctane, le rapport OH∗/CH∗ est indépendant du taux d'étirement de la flamme, alors qu'une dépendance est observée pour l'éthanol et le méthanol.
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Mot clés : Combustion, Richesse, Chimiluminescence, Dégagement de chaleur, Flammes prémélangées, Type de combustible
Mikaël Orain 1; Yannis Hardalupas 2
@article{CRMECA_2010__338_5_241_0, author = {Mika\"el Orain and Yannis Hardalupas}, title = {Effect of fuel type on equivalence ratio measurements using chemiluminescence in premixed flames}, journal = {Comptes Rendus. M\'ecanique}, pages = {241--254}, publisher = {Elsevier}, volume = {338}, number = {5}, year = {2010}, doi = {10.1016/j.crme.2010.05.002}, language = {en}, }
TY - JOUR AU - Mikaël Orain AU - Yannis Hardalupas TI - Effect of fuel type on equivalence ratio measurements using chemiluminescence in premixed flames JO - Comptes Rendus. Mécanique PY - 2010 SP - 241 EP - 254 VL - 338 IS - 5 PB - Elsevier DO - 10.1016/j.crme.2010.05.002 LA - en ID - CRMECA_2010__338_5_241_0 ER -
Mikaël Orain; Yannis Hardalupas. Effect of fuel type on equivalence ratio measurements using chemiluminescence in premixed flames. Comptes Rendus. Mécanique, Volume 338 (2010) no. 5, pp. 241-254. doi : 10.1016/j.crme.2010.05.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2010.05.002/
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