Analysis of flame acceleration induced by wall friction in open tubes
Artikel i vetenskaplig tidskrift, 2010
Spontaneous flame acceleration leading to explosion triggering in open tubes/channels due to wall friction was analytically and computationally studied. It was first demonstrated that the acceleration is affected when the thermal expansion across the flame exceeds a critical value depending on the combustion configuration. For the axisymmetric flame propagation in cylindrical tubes with both ends open, a theory of the initial (exponential) stage of flame acceleration in the quasi-isobaric limit was developed and substantiated by extensive numerical simulation of the hydrodynamics and combustion with an Arrhenius reaction. The dynamics of the flame shape, velocity, and acceleration rate, as well as the velocity profile ahead and behind the flame, have been determined. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3425646]
transition
sound
flames
chemically reactive flow
channels
friction
deflagration
thermal expansion
premixed flames
explosions
large-eddy simulation
combustion
instability
channel flow
detonation
nonslip
turbulent
Författare
V. Akkerman
Princeton University
C. K. Law
Princeton University
V. Bychkov
Umeå universitet
Lars-Erik Eriksson
Chalmers, Tillämpad mekanik, Strömningslära
Physics of Fluids
1070-6631 (ISSN) 1089-7666 (eISSN)
Vol. 22 5 1-14 009005PHFÄmneskategorier
Maskinteknik
DOI
10.1063/1.3425646