TY - JOUR
T1 - The effect of wall thermal conductivity on the thermal performance of a partially filled micro porous combustor
AU - Wang, Wei
AU - Zuo, Zhengxing
AU - Liu, Jinxiang
N1 - Publisher Copyright:
© 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of ICAE2018 - The 10th International Conference on Applied Energy.
PY - 2019
Y1 - 2019
N2 - As the key component of the micro power system, the thermal performance of the micro combustor is crucial to the system efficiency. In this paper, the numerical simulation of a micro combustor partially filled with porous medium was conducted. The thermal non-equilibrium model was employed in to investigate the heat transfer between the gas and porous medium. The effect of wall thermal conductivity on thermal performance, chemical reactions in porous medium, and the heat recirculation through porous medium and wall was deeply analyzed. The results show that, in stable operation range, higher wall thermal conductivity or inlet velocity enhances the heat recirculation and reduces the heat loss ratio. The enhancement effect of wall thermal conductivity on reaction rate of R179 "i-C3H7+O2=C3H6+HO2" in porous medium zone is stronger for high inlet velocity and negligible for low inlet velocity. Increasing the wall thermal conductivity can promote the heat recirculation of the micro combustion mainly through gas-to-porous heat convection, while the gas-to-wall heat convection exchange can promote the flame moving upstream, extending the stable operation range of the micro porous combustor.
AB - As the key component of the micro power system, the thermal performance of the micro combustor is crucial to the system efficiency. In this paper, the numerical simulation of a micro combustor partially filled with porous medium was conducted. The thermal non-equilibrium model was employed in to investigate the heat transfer between the gas and porous medium. The effect of wall thermal conductivity on thermal performance, chemical reactions in porous medium, and the heat recirculation through porous medium and wall was deeply analyzed. The results show that, in stable operation range, higher wall thermal conductivity or inlet velocity enhances the heat recirculation and reduces the heat loss ratio. The enhancement effect of wall thermal conductivity on reaction rate of R179 "i-C3H7+O2=C3H6+HO2" in porous medium zone is stronger for high inlet velocity and negligible for low inlet velocity. Increasing the wall thermal conductivity can promote the heat recirculation of the micro combustion mainly through gas-to-porous heat convection, while the gas-to-wall heat convection exchange can promote the flame moving upstream, extending the stable operation range of the micro porous combustor.
KW - Micro combustion
KW - Porous medium
KW - Propane
KW - Wall thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=85063867079&partnerID=8YFLogxK
U2 - 10.1016/j.egypro.2019.01.677
DO - 10.1016/j.egypro.2019.01.677
M3 - Conference article
AN - SCOPUS:85063867079
SN - 1876-6102
VL - 158
SP - 5188
EP - 5194
JO - Energy Procedia
JF - Energy Procedia
T2 - 10th International Conference on Applied Energy, ICAE 2018
Y2 - 22 August 2018 through 25 August 2018
ER -