TY - JOUR
T1 - Gas compression moderates flame acceleration in deflagration-to-detonation transition
AU - Bychkov, Vitaly
AU - Valiev, Damir
AU - Akkerman, V'Yacheslav
AU - Law, Chung King
N1 - Funding Information:
This work was mostly supported by the Swedish Research Council (VR) and the Swedish Kempe Foundation. The numerical simulation was performed at the High Performance Computer Center North (HPC2N), Umeå, Sweden. The work at Princeton University was supported by the U.S. Air Force Office of Scientific Research and by Foundation in the Memory of Lars Hiertas.
PY - 2012/7/1
Y1 - 2012/7/1
N2 - The effect of gas compression at the developed stages of flame acceleration in smooth-wall and obstructed channels is studied. We demonstrate analytically that gas compression moderates the acceleration rate, and we perform numerical simulations within the problem of flame transition to detonation. It is shown that flame acceleration undergoes three distinctive stages: (1) initial exponential acceleration in the incompressible regime, (2) moderation of the acceleration process due to gas compression, so that the exponential acceleration state goes over to a much slower one, (3) eventual saturation to a steady (or statistically steady) high-speed deflagration velocity, which may be correlated with the Chapman-Jouguet deflagration speed. The possibility of deflagration-to-detonation transition is demonstrated.
AB - The effect of gas compression at the developed stages of flame acceleration in smooth-wall and obstructed channels is studied. We demonstrate analytically that gas compression moderates the acceleration rate, and we perform numerical simulations within the problem of flame transition to detonation. It is shown that flame acceleration undergoes three distinctive stages: (1) initial exponential acceleration in the incompressible regime, (2) moderation of the acceleration process due to gas compression, so that the exponential acceleration state goes over to a much slower one, (3) eventual saturation to a steady (or statistically steady) high-speed deflagration velocity, which may be correlated with the Chapman-Jouguet deflagration speed. The possibility of deflagration-to-detonation transition is demonstrated.
KW - Deflagration-to-detonation transition
KW - Flame acceleration
KW - Flame-obstacle interaction
KW - Gas compression
KW - Numerical simulations
KW - Premixed burning
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U2 - 10.1080/00102202.2012.663995
DO - 10.1080/00102202.2012.663995
M3 - Article
AN - SCOPUS:84864981108
SN - 0010-2202
VL - 184
SP - 1066
EP - 1079
JO - Combustion science and technology
JF - Combustion science and technology
IS - 7-8
ER -