用户登录 购物车
图书馆订购 Guest
主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering

ISSN 在线: 2379-1748

ISBN 打印: 978-1-56700-517-2 (Flash drive)

5-6th Thermal and Fluids Engineering Conference (TFEC)
May, 26–28, 2021 , Virtual

AN INVESTIGATION OF THE PREMIXED COMBUSTION IN A TWO-SECTION NON-CATALYTIC POROUS MEDIUM BY NUMERICAL SIMULATION

Get access pages 121-130
DOI: 10.1615/TFEC2021.cbf.032322

摘要

Combustion in porous media has obtained a significant amount of attention within recent decades by offering several advantages cannot be achieved in conventional free flame burners. Lower pollutant emissions, higher flammability limits and better flame stabilization are some examples of these advantages. This work presents a computational study on the premixed combustion of a methane/air mixture in a porous medium burner. The porous medium comprised of two sections: the upstream one was labeled the preheating section and the downstream one was labeled the combustion section. GRI 3 reaction mechanism including 53 species and 325 reactions was used for methane oxidation. The model was validated against published experimental and numerical data. Conducting a baseline study, it was found that in a portion of the preheating section, porous medium gained higher temperature than the gas phase whereas it was vice versa throughout the combustion section. Moreover, it was noted that although CO concentration attained its peak at the flame front, NO concentration reached its peak at the burner exit. A stability analysis illustrated that interface of the two porous sections was a location at which flame could stabilize for a range of equivalence ratios. A parametric study revealed that as the mixture equivalence ratio ranged from 0.75 to 1.25, CO emission monotonically increased while NO emission first increased and reached its maximum for the stoichiometric mixture then decreased as the mixture became fuel-rich. Investigation of the porous medium extinction coefficient showed that larger extinction coefficients reduced the burner emissions.
主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering 中文 English Русский Português 帮助 联系我们 返回至ASTFE