Combustion in a Hybrid Porous Burner Packed with Alumina Pellets and Silicon Carbide Foams with a Gap
Publication: Journal of Energy Engineering
Volume 143, Issue 5
Abstract
Combustion of premixed methane/air in a hybrid porous burner is experimentally studied. The burner is filled with alumina pellets in the preheating zone and silicon carbide foams with a gap in the combustion region. Different lengths and locations of gap are evaluated to identify how the geometric parameters affect flame stability, flame temperature, and pollutant emission (CO, HC, and ). The maximum stable flame range is obtained when the gap length is 15 mm and located between the packed alumina pellets and silicon carbide foams. When the gap is inside the foam region, the flame always stabilizes in the porous region regardless of the foam before or after the gap. The flame temperature decreases with the increase of gap length or with the decrease of foam region after the gap. The CO emission and the flame temperature exhibit opposite tendencies with the variation of flame speed. The HC emission increases with the increase of gap length or when the gap moves to the downstream. It implies that the preheating effect caused by the gap location is dominant to the formation of HC emission. The emission is 4 ppm, which is relatively low attributable to the lower flame temperature.
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Acknowledgments
This study is supported by the National Natural Science Foundation of China (No. 51676153) and National Program for Support of Top-Notch Young Professionals.
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Published In
Journal of Energy Engineering
Volume 143 • Issue 5 • October 2017
Copyright
©2017 American Society of Civil Engineers.
History
Received: Oct 11, 2016
Accepted: Feb 17, 2017
Published online: May 27, 2017
Published in print: Oct 1, 2017
Discussion open until: Oct 27, 2017
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