TY - JOUR
T1 - Flame Propagation in CH4/H2/O2 Blended Mixtures in Smooth Tubes of Millimeter-Scale
AU - Hsu, Yao Chung
AU - Chao, Yei Chin
AU - Chung, Kung Ming
N1 - Funding Information:
The authors gratefully acknowledge the financial support by the Ministry of Science and Technology (MOST 100-2623-E-006-015-D).
Publisher Copyright:
© 2016 Taylor & Francis.
PY - 2016/8/2
Y1 - 2016/8/2
N2 - There are few studies of flame propagation and the initiation of detonation for blended mixtures. In this article, an experimental study is conducted to investigate the acceleration of a flame in stoichiometric methane/hydrogen/oxygen (CH4/H2/O2) mixtures in millimeter-scale smooth tubes. In the 1.0- and 1.5-mm tubes, there is no flame acceleration or detonation initiation. The flame propagates at a speed of several m/s. This may occur because of the heat loss on a non-adiabatic wall and the condensation of water vapor. When the molar fraction of CH4 in a 3.0-mm tube is larger than 0.3, detonation is initiated. The early stage of flame propagation is divided into propagation at a constant velocity, deceleration, and exponential acceleration. An increase in the molar fraction of CH4 induces a pulsating propagation of a flame.
AB - There are few studies of flame propagation and the initiation of detonation for blended mixtures. In this article, an experimental study is conducted to investigate the acceleration of a flame in stoichiometric methane/hydrogen/oxygen (CH4/H2/O2) mixtures in millimeter-scale smooth tubes. In the 1.0- and 1.5-mm tubes, there is no flame acceleration or detonation initiation. The flame propagates at a speed of several m/s. This may occur because of the heat loss on a non-adiabatic wall and the condensation of water vapor. When the molar fraction of CH4 in a 3.0-mm tube is larger than 0.3, detonation is initiated. The early stage of flame propagation is divided into propagation at a constant velocity, deceleration, and exponential acceleration. An increase in the molar fraction of CH4 induces a pulsating propagation of a flame.
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U2 - 10.1080/00102202.2016.1177033
DO - 10.1080/00102202.2016.1177033
M3 - Article
AN - SCOPUS:84978410023
SN - 0010-2202
VL - 188
SP - 1239
EP - 1248
JO - Combustion science and technology
JF - Combustion science and technology
IS - 8
ER -