TY - JOUR
T1 - Effects of preheating and operation conditions on combustion in a porous medium
AU - Huang, Y.
AU - Chao, C. Y.H.
AU - Cheng, P.
N1 - Funding Information:
The authors would like to acknowledge the financial supports of this work by the Research Grant Council of Hong Kong through Project no. HKUST6016/98E and DAG 98/99.EG29. They would like to thank Mr. Z.P. Zeng for his assistance in the experiments.
PY - 2002/10
Y1 - 2002/10
N2 - The effects of preheating conditions (including the critical energy content, the firing rate, and the equivalence ratio) on the initiation and extinction of a super-adiabatic combustion (SAC) in a steady flow of propane/air mixture through a stack of stainless steel screens (an inert porous medium) are investigated. It is found that there are critical conditions for the initiation and extinction of a SAC in the steady flow through the inert porous column. The critical preheating energy required to initiate a SAC is found to decrease with the increase of the preheating equivalence ratio, the preheating firing rate, and the operational equivalence ratio. After the initiation of a SAC, two combustion modes (i.e., stable combustion mode and push-forward combustion mode) have been observed. These combustion modes are determined by the operational conditions.
AB - The effects of preheating conditions (including the critical energy content, the firing rate, and the equivalence ratio) on the initiation and extinction of a super-adiabatic combustion (SAC) in a steady flow of propane/air mixture through a stack of stainless steel screens (an inert porous medium) are investigated. It is found that there are critical conditions for the initiation and extinction of a SAC in the steady flow through the inert porous column. The critical preheating energy required to initiate a SAC is found to decrease with the increase of the preheating equivalence ratio, the preheating firing rate, and the operational equivalence ratio. After the initiation of a SAC, two combustion modes (i.e., stable combustion mode and push-forward combustion mode) have been observed. These combustion modes are determined by the operational conditions.
UR - http://www.scopus.com/inward/record.url?scp=0036778748&partnerID=8YFLogxK
U2 - 10.1016/S0017-9310(02)00137-0
DO - 10.1016/S0017-9310(02)00137-0
M3 - Journal article
AN - SCOPUS:0036778748
SN - 0017-9310
VL - 45
SP - 4315
EP - 4324
JO - International Journal of Heat and Mass Transfer
JF - International Journal of Heat and Mass Transfer
IS - 21
ER -