简介: |
A premixed combustion front propagates either as a slow subsonic flame (deflagration) or fast supersonic detonation; their velocities differ by 3-4 orders of magnitude. However, at certain conditions a slow flame may spontaneously accelerate and trigger detonation. A deflagration-to-detonation transition (DDT) is the key point, for example, for explaining Thermonuclear Supernovae (Type Ia) and in the design of pulse-detonation engines of the new-generation aircrafts; it stands also behind many disasters like explosions in rockets, nuclear plants and mines.
Spontaneous flame acceleration is the reason and the most important stage of the DDT. In this talk I will present our results on the flame acceleration process. The presentation includes both development of the classical Shelkin mechanism of flame acceleration in tubes with smooth walls, and the new ultra-fast mechanism of flame acceleration in obstructed channels, explained by our group. Moderation of the flame acceleration process at the developed stages and explosion triggering will be also discussed.
个人简历：
RESEARCH POSITIONS: 2008 - … Umeå University, Sweden Professor
2000 - 2008 Umeå University, Sweden Associate Professor
1996 - 2000 Umeå University, Sweden Professor Assistant
1994 - 1996 Uppsala University, Sweden PostDoc
1992 - 1994 Uppsala University, Sweden Visiting PhD student
PUBLICATIONS:
Books and monographs 2
Articles in refereed journals 88
Invited papers in books 5
Conference reports 58
RESEARCH EXPERIENCE:
Plasma Physics:
Inertial confined fusion, Magneto-hydrodynamics, Plasma equilibrium, Hydrodynamic and magneto-hydrodynamic instabilities in plasma; Non-linear effects in plasma, Shocks in plasma, Plasma surface waves, Quantum plasma;
Nonlinear Physics:
Nonlinear oscillations and waves, Weak nonlinearity and perturbation methods, Wave interaction, Shocks and Solitons, Bifurcations, Front propagation, Instabilities, Nonlinear stabilization, Fractals;
Fluid Dynamics:
The Rayleigh-Taylor instability and other hydrodynamic instabilities, Bubble motion in a fluid, Rotational and irrotational flows, Turbulence, Flows in pipes, Heat transfer and phase transitions, Acoustics, Shocks, Explosions;
Combustion:
Dynamics and stability of laminar flames, Propagation of turbulent flames, Flame-acoustic and flame-shock interaction, Flame acceleration, Explosion triggering, Burning in engines, Detonation, Flame ignition;
Astrophysics:
Supernova events, Thermonuclear explosions, White dwarfs, Gravitational collapse. |
