This study details the influence of reactant temperature on the stability of non-premixed CH4/air co-flow jet flames. Flame characteristics have been studied for five temperature levels (from 295 K to 600 K). The hysteresis zone formed by the limits between attached and lifted flame translates towards higher methane jet velocities with an increase of initial temperature, independently of the air velocity range. Moreover, critical velocities vary linearly with initial temperature. In addition, attachment and lift-off heights have been obtained from CH* chemiluminescence visualization. Results point out that the attachment height decreases significantly with temperature. Observations also indicate that the intrinsic process of lifting is modified. Pre-lifting anchored flame local extinctions, not observed at room-temperature, appear at higher initial temperatures; their occurrence increases with temperature. The lift-off height of turbulent lifted flames is also reduced with temperature. Overall, results show that increasing local temperature in the stabilization zone enhances flame stability.
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2010 14th International Heat Transfer Conference
August 8–13, 2010
Washington, DC, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4938-5
PROCEEDINGS PAPER
Effect of Reactant Preheating on the Stability of Non-Premixed Methane/Air Flames
Sylvain Lamige
,
Sylvain Lamige
Universite´ de Lyon, Villeurbanne, France
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Ce´dric Galizzi
,
Ce´dric Galizzi
Universite´ de Lyon, Villeurbanne, France
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Jiesheng Min
,
Jiesheng Min
Universite´ et INSA de Rouen, Saint-E´tienne de Rouvray, France
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Julien Perles
,
Julien Perles
Universite´ de Lyon, Villeurbanne, France
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Fre´de´ric Andre´
,
Fre´de´ric Andre´
Universite´ de Lyon, Villeurbanne, France
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Franc¸oise Baillot
,
Franc¸oise Baillot
Universite´ et INSA de Rouen, Saint-E´tienne de Rouvray, France
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Dany Escudie´
Dany Escudie´
Universite´ de Lyon, Villeurbanne, France
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Sylvain Lamige
Universite´ de Lyon, Villeurbanne, France
Ce´dric Galizzi
Universite´ de Lyon, Villeurbanne, France
Jiesheng Min
Universite´ et INSA de Rouen, Saint-E´tienne de Rouvray, France
Julien Perles
Universite´ de Lyon, Villeurbanne, France
Fre´de´ric Andre´
Universite´ de Lyon, Villeurbanne, France
Franc¸oise Baillot
Universite´ et INSA de Rouen, Saint-E´tienne de Rouvray, France
Dany Escudie´
Universite´ de Lyon, Villeurbanne, France
Paper No:
IHTC14-22938, pp. 205-210; 6 pages
Published Online:
March 1, 2011
Citation
Lamige, S, Galizzi, C, Min, J, Perles, J, Andre´, F, Baillot, F, & Escudie´, D. "Effect of Reactant Preheating on the Stability of Non-Premixed Methane/Air Flames." Proceedings of the 2010 14th International Heat Transfer Conference. 2010 14th International Heat Transfer Conference, Volume 3. Washington, DC, USA. August 8–13, 2010. pp. 205-210. ASME. https://doi.org/10.1115/IHTC14-22938
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