The initial mechanism of cellular instabilities on the flame surface was investigated experimentally. Firstly, mono-dispersed ethanol droplets were created via the Wilson cloud principle in a spherical combustion chamber, and aerosol ethanol/air flame propagation was tracked under microgravity conditions. Schlieren images revealed that at the beginning of the cellular structure formation, dark spots formed linking to the signal loss in a density gradient. This phenomenon is assumed to be local extinction and quenching on the flame front due to either liquid droplets’ presence or evaporation. To further investigate the observed phenomenon, stagnation flame experiments were performed for rich propane/air gaseous flames with isolated ethanol droplet injection. The evidence for the local extinction on the flame surface due to droplet passage was found via the Chemiluminescence method. The intrinsic instabilities were found to be triggered by the droplets in cases where the flame cannot recover its initial state.
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Deniz Kaya Eyice 1, 2, 3 ; Fabien Halter 1, 2 ; Ahmet Yozgatlıgil 3 ; İskender Gökalp 1, 3 ; Christian Chauveau 1
@article{CRMECA_2023__351_S2_41_0, author = {Deniz Kaya Eyice and Fabien Halter and Ahmet Yozgatl{\i}gil and \.Iskender G\"okalp and Christian Chauveau}, title = {Investigation of cellular instabilities and local extinction for two-phase flames under microgravity conditions}, journal = {Comptes Rendus. M\'ecanique}, pages = {41--56}, publisher = {Acad\'emie des sciences, Paris}, volume = {351}, number = {S2}, year = {2023}, doi = {10.5802/crmeca.174}, language = {en}, }
TY - JOUR AU - Deniz Kaya Eyice AU - Fabien Halter AU - Ahmet Yozgatlıgil AU - İskender Gökalp AU - Christian Chauveau TI - Investigation of cellular instabilities and local extinction for two-phase flames under microgravity conditions JO - Comptes Rendus. Mécanique PY - 2023 SP - 41 EP - 56 VL - 351 IS - S2 PB - Académie des sciences, Paris DO - 10.5802/crmeca.174 LA - en ID - CRMECA_2023__351_S2_41_0 ER -
%0 Journal Article %A Deniz Kaya Eyice %A Fabien Halter %A Ahmet Yozgatlıgil %A İskender Gökalp %A Christian Chauveau %T Investigation of cellular instabilities and local extinction for two-phase flames under microgravity conditions %J Comptes Rendus. Mécanique %D 2023 %P 41-56 %V 351 %N S2 %I Académie des sciences, Paris %R 10.5802/crmeca.174 %G en %F CRMECA_2023__351_S2_41_0
Deniz Kaya Eyice; Fabien Halter; Ahmet Yozgatlıgil; İskender Gökalp; Christian Chauveau. Investigation of cellular instabilities and local extinction for two-phase flames under microgravity conditions. Comptes Rendus. Mécanique, Volume 351 (2023) no. S2, pp. 41-56. doi : 10.5802/crmeca.174. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.174/
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