Pulsating combustion of ethylene in micro-channels with a controlled temperature gradient

Abstract : The aim of this work is to investigate the combustion dynamics of ethylene/air flames at atmospheric pressure in a micro-flow reactor over a wide range of equivalence ratios (0.3<φ<1.5). The presence of three main flame regimes was confirmed: stable flames, Flames with Repetitive Extinction and Ignition (FREI) and weak flames. Weak flames were observed at equivalence ratio of 0.3, confirming the potential of micro-combustor technology under ultra-lean conditions. Furthermore, the stable flames analysis allows us to find a correlation between the stabilization temperatures of these flames and the laminar flame speeds at various equivalence ratios. Regarding the unstable flames, it was possible for the first time to follow the flame progression at high frequency using a high-speed camera and the results were compared with the CH* emission profiles obtained with an EMCCD camera. Finally, the existence of oscillating flames between the three main flame regimes was confirmed, and a frequency analysis was performed.
Document type :
Poster communications
Complete list of metadatas

https://hal.archives-ouvertes.fr/hal-02063471
Contributor : Christian Chauveau <>
Submitted on : Monday, March 11, 2019 - 11:25:52 AM
Last modification on : Thursday, April 11, 2019 - 9:54:12 AM
Long-term archiving on: Wednesday, June 12, 2019 - 1:52:55 PM

File

PosterSympo2016_AnnalisaDiStaz...
Files produced by the author(s)

Identifiers

Collections

Citation

Annalisa Di Stazio, Christian Chauveau, Guillaume Dayma, Philippe Dagaut. Pulsating combustion of ethylene in micro-channels with a controlled temperature gradient. 36th International Symposium on Combustion, Jul 2016, Seoul, South Korea. ⟨10.13140/RG.2.2.14743.42407⟩. ⟨hal-02063471⟩

Share

Metrics

Record views

8

Files downloads

14