Search: onr:"swepub:oai:DiVA.org:kth-9146" >
Numerical Simulatio...
Numerical Simulation of Deflagration-to-Detonation Transition : the Role of Hydrodynamic Instability
-
- Liberman, M. A. (author)
- Uppsala universitet,Fysiska institutionen,Department of Physics, Uppsala University
-
- Sivashinsky, G. I. (author)
- School of Mathematical Sciences, Tel Aviv University
-
- Valiev, Damir (author)
- Uppsala universitet,Fysiska institutionen,Department of Physics, Uppsala University
-
show more...
-
- Eriksson, L.-E. (author)
- Department of Applied Mechanics, Chalmers University of Technology
-
show less...
-
(creator_code:org_t)
- 2006
- 2006
- English.
-
In: International Journal of Transport Phenomena. - 1028-6578. ; 8, s. 253-277
- Related links:
-
http://www.oldcitypu...
-
show more...
-
https://urn.kb.se/re...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- The role of the flame folding, induced by the classical Darrieus-Landau instability, on the transition from deflagration to detonation is studied by numerical simulations of premixed gas combustion spreading from the closed end of a semi-infinite, smooth-walled channel. It is found that in sufficiently wide channels the Darrieus-Landau instability may invoke nucleation of hot spots within the folds of the developing wrinkled flame, triggering an abrupt transition from deflagrative to detonative combustion. The mechanism of the transition is the temperature increase due to the influx of heat from the folded reaction zone, followed by autoignition. The transition occurs when the pressure elevation at the accelerating reaction front becomes high enough to produce a shock capable of supporting detonation. This requires the fold to be sufficiently narrow and deep. The influence of adhesive and rough walls on the transition is discussed.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- flame
- combusion
- detonation
- explosion
- flame instabilities
- Physics
- Fysik
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database