Sökning: onr:"swepub:oai:DiVA.org:kth-9146" >
Numerical Simulatio...
Numerical Simulation of Deflagration-to-Detonation Transition : the Role of Hydrodynamic Instability
-
- Liberman, M. A. (författare)
- Uppsala universitet,Fysiska institutionen,Department of Physics, Uppsala University
-
- Sivashinsky, G. I. (författare)
- School of Mathematical Sciences, Tel Aviv University
-
- Valiev, Damir (författare)
- Uppsala universitet,Fysiska institutionen,Department of Physics, Uppsala University
-
visa fler...
-
- Eriksson, L.-E. (författare)
- Department of Applied Mechanics, Chalmers University of Technology
-
visa färre...
-
(creator_code:org_t)
- 2006
- 2006
- Engelska.
-
Ingår i: International Journal of Transport Phenomena. - 1028-6578. ; 8, s. 253-277
- Relaterad länk:
-
http://www.oldcitypu...
-
visa fler...
-
https://urn.kb.se/re...
-
https://urn.kb.se/re...
-
visa färre...
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Nyckelord
- flame
- combusion
- detonation
- explosion
- flame instabilities
- Physics
- Fysik
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas