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 1-14 009005PHF

Ämneskategorier

Maskinteknik

DOI

10.1063/1.3425646