Results 21 to 30 of about 760,958 (323)

Effect of Obstacle Length Variation on Hydrogen Deflagration in a Confined Space Based on Large Eddy Simulations [PDF]

Journal of Applied Fluid Mechanics, 2023
In the field of hydrogen safety and combustion, the effect of obstacles on hydrogen deflagration is a topic of general interest to scholars. In previous studies, scholars usually used uniform obstacles under various operating conditions and obtained ...
B. Ai, J. Gao, B. Hao, B. Guo, J. Liang
doaj   +1 more source

On the Evolution of Thermonuclear Flames on Large Scales [PDF]

, 2006
The thermonuclear explosion of a massive white dwarf in a Type Ia supernova explosion is characterized by vastly disparate spatial and temporal scales. The extreme dynamic range inherent to the problem prevents the use of direct numerical simulation and ...
Alexei M. Khokhlov, Ju Zhang, O. E. Bronson Messer, Reinecke M., Tomasz Plewa   +4 more
core   +2 more sources

Analysis of Gaseous and Gaseous-Dusty, Premixed Flame Propagation in Obstructed Passages with Tightly Placed Obstacles

Fluids, 2020
A recent predictive scenario of premixed flame propagation in unobstructed passages is extended to account for obstructions that can be encountered in facilities dealing with explosive materials such as in coalmines.
Furkan Kodakoglu, Sinan Demir, Damir Valiev, V’yacheslav Akkerman   +3 more
doaj   +1 more source

Capabilities and limitations of Large Eddy Simulation with perfectly stirred reactor assumption for engineering applications of unsteady, hydrogen combustion sequences

Engineering Applications of Computational Fluid Mechanics, 2021
This work evaluates the capabilities of Large Eddy Simulation with perfectly stirred reactor (PSR) assumption and detailed chemistry to predict unsteady, premixed, hydrogen combustion sequences.
F. Nicolás-Pérez, F. J. S. Velasco, R. A. Otón-Martínez, J. R. García-Cascales, A. Bentaib, N. Chaumeix   +5 more
doaj   +1 more source

Numerical Modeling of Combustion and Detonation in Aqueous Foams

Energies, 2021
Combustible aqueous foams and foamed emulsions represent prospective energy carriers. This paper is devoted to the overview of model assumptions required for numerical simulations of combustion and detonation processes in aqueous foams.
Alexey Kiverin, Ivan Yakovenko
doaj   +1 more source

The Thermonuclear Explosion Of Chandrasekhar Mass White Dwarfs [PDF]

, 1996
The flame born in the deep interior of a white dwarf that becomes a Type Ia supernova is subject to several instabilities. We briefly review these instabilities and the corresponding flame acceleration. We discuss the conditions necessary for each of the
Blinnikov S. I., Blinnikov S. I., Bychkov V. V., Clavin P., Davies R. M., J. C. Niemeyer, Kerstein A., Kerstein A., Khokhlov A. M., Khokhlov A. M., Khokhlov A. M., Khokhlov A. M., Khokhlov A. M., Landau L. D., Markstein G. H., North G. L., S. E. Woosley, Zeldovich Ya. B.   +17 more
core   +3 more sources

Effect of surface friction on ultrafast flame acceleration in obstructed cylindrical pipes

AIP Advances, 2019
The Bychkov model of ultrafast flame acceleration in obstructed tubes [Valiev et al., “Flame Acceleration in Channels with Obstacles in the Deflagration-to-Detonation Transition,” Combust.
Abdulafeez Adebiyi, Rawan Alkandari, Damir Valiev, V’yacheslav Akkerman   +3 more
doaj   +1 more source

Promotion of deflagration-to-detonation transition by repeated obstacle rods

Journal of Thermal Science and Technology, 2021
We experimentally investigated the promotion of deflagration-to-detonation transition (DDT) in hydrogen-air mixtures contained in a tube in which straight-shaped rods were installed as obstacles.
Yoko SEKI, Ryuji KOBAYASHI, Wookyung KIM, Tomoyuki JOHZAKI, Takuma ENDO   +4 more
doaj   +1 more source

Influence of gas compression on flame acceleration in the early stage of burning in tubes

, 2012
The mechanism of finger flame acceleration at the early stage of burning in tubes was studied experimentally by Clanet and Searby [Combust. Flame 105: 225 (1996)] for slow propane-air flames, and elucidated analytically and computationally by Bychkov et ...
Akkerman, V'yacheslav, Bychkov, Vitaly, Eriksson, Lars-Erik, Kuznetsov, Mikhail, Law, Chung K., Valiev, Damir   +5 more
core   +1 more source

The Propagation Characteristics of Turbulent Expanding Flames of Methane/Hydrogen Blending Gas

Energies
In the present study, the effect of hydrogen addition on turbulent flame propagation characteristics is investigated in a fan-stirred combustion chamber.
Haoran Zhao, Chunmiao Yuan, Gang Li, Fuchao Tian   +3 more
doaj   +1 more source