TY - JOUR
T1 - Transition to detonation of an expanding spherical flame
AU - Kagan, Leonid
AU - Sivashinsky, Gregory
N1 - Publisher Copyright:
© 2016 The Combustion Institute
PY - 2017/1/1
Y1 - 2017/1/1
N2 - With a freely expanding unwrinkled spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is possible, provided the flame is close to its propagability threshold and the deficient reactant Lewis number is not too small. The transition is triggered by the thermal runaway induced by positive feedback between the accelerating flame and the flame-driven pressure build-up. A possible way to account for the impact of wrinkling is discussed.
AB - With a freely expanding unwrinkled spherical flame as an example, it is shown that deflagration-to-detonation transition in unconfined gaseous systems is possible, provided the flame is close to its propagability threshold and the deficient reactant Lewis number is not too small. The transition is triggered by the thermal runaway induced by positive feedback between the accelerating flame and the flame-driven pressure build-up. A possible way to account for the impact of wrinkling is discussed.
KW - Accelerating flames
KW - Deflagration-to-detonation transition
KW - Stepwise ignition-temperature kinetics
KW - Thermal runaway of fast flames
UR - http://www.scopus.com/inward/record.url?scp=84977654386&partnerID=8YFLogxK
U2 - 10.1016/j.combustflame.2016.06.001
DO - 10.1016/j.combustflame.2016.06.001
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AN - SCOPUS:84977654386
SN - 0010-2180
VL - 175
SP - 307
EP - 311
JO - Combustion and Flame
JF - Combustion and Flame
ER -