TY - JOUR
T1 - On a porous medium combustor for hydrogen flame stabilization and operation
AU - Su, Siou Sheng
AU - Hwang, Sheng Jye
AU - Lai, Wei Hsiang
N1 - Funding Information:
This work was supported by National Science Council of Taiwan (grant number NSC 102-2221-E-006-180 ), and this research also received funding from the Headquarters of University Advancement at the National Cheng Kung University, which is sponsored by the Ministry of Education, Taiwan, ROC . The authors also express their appreciation to Dr. Ming-Pin Lai at Research Center for Energy Technology and Strategy (RCETS) for his assistance and discussion in relation the design and preparation of the experiment.
Publisher Copyright:
© 2014
PY - 2014/12/1
Y1 - 2014/12/1
N2 - In this study, the characteristics of hydrogen flame stabilization in porous medium combustor were investigated. The flame was observed in a quartz tube. The porous medium was oxide-bonded silicon carbide (OB-SiC) or aluminum oxide (Al2O3) with 60 PPI and 30 PPI pore size distributions. The results indicated that under a low equivalence operation, the flame would transform from surface combustion to interior combustion with an increased heating value. Under a high equivalence ratio, both interior combustion and flashback transition existed at the same time. The thermal conductivity of silicon carbide is higher than that of aluminum oxide. Thus, interior combustion region was more extensive under a low equivalence ratio operation with a high premixed gas velocity. Flashback was apparent for Al2O3under high an equivalence ratio with low a premixed gas velocity. Consequently, hydrogen flame stability could be controlled by the pore size distribution and thermal conductivity of the porous media, input heating value and input equivalence ratio.
AB - In this study, the characteristics of hydrogen flame stabilization in porous medium combustor were investigated. The flame was observed in a quartz tube. The porous medium was oxide-bonded silicon carbide (OB-SiC) or aluminum oxide (Al2O3) with 60 PPI and 30 PPI pore size distributions. The results indicated that under a low equivalence operation, the flame would transform from surface combustion to interior combustion with an increased heating value. Under a high equivalence ratio, both interior combustion and flashback transition existed at the same time. The thermal conductivity of silicon carbide is higher than that of aluminum oxide. Thus, interior combustion region was more extensive under a low equivalence ratio operation with a high premixed gas velocity. Flashback was apparent for Al2O3under high an equivalence ratio with low a premixed gas velocity. Consequently, hydrogen flame stability could be controlled by the pore size distribution and thermal conductivity of the porous media, input heating value and input equivalence ratio.
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U2 - 10.1016/j.ijhydene.2014.10.059
DO - 10.1016/j.ijhydene.2014.10.059
M3 - Article
AN - SCOPUS:84945164061
SN - 0360-3199
VL - 39
SP - 21307
EP - 21316
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 36
ER -