Results 11 to 20 of about 5,124 (165)

Computational Study of Premixed Flame Propagation in Micro-Channels with Nonslip Walls: Effect of Wall Temperature

Fluids, 2021
This investigation evaluates the propagation of premixed flames in narrow channels with isothermal walls. The study is based on the numerical solution of the set of fully-compressible, reacting flow equations that includes viscosity, diffusion, thermal ...
Orlando J. Ugarte, V’yacheslav Akkerman   +1 more
doaj   +1 more source

An Elementary Model for a Self-Accelerating Outward Propagating Flame Subject to the Rayleigh–Taylor Instability: Transition to Detonation

Fluids, 2020
Within the Boussinesq approximation, an elementary model for the deflagration-to-detonation transition triggered by self-acceleration of an expanding flame is formulated and explored.
Leonid Kagan, Gregory Sivashinsky
doaj   +1 more source

The effects of addition of carbon dioxide and water vapor on the dynamic behavior of spherically expanding hydrogen/air premixed flames

Journal of Thermal Science and Technology, 2021
Utilizing efficiently and securely hydrogen as clean energy source, it is required not only to analyze the experimental data under a certain condition but also to create the mathematical model for the prediction of flame propagation velocity under ...
Toshiyuki KATSUMI, Yasuhito YOSHIDA, Ryo NAKAGAWA, Shinya YAZAWA, Masashi KUMADA, Daisuke SATO, Thwe Thwe Aung, Nabiha CHAUMEIX, Satoshi KADOWAKI   +8 more
doaj   +1 more source

Numerical analysis of flow fields generated by accelerating flames [PDF]

17th Aerospace Sciences Meeting, 1979
A numerical technique is presented for the analysis of nonsteady flowfields generated by accelerating flames in gaseous media. The problem is formulated in Eulerian coordinates and the solution is based on the extension of the floating shock-fitting technique to all the discontinuities and their interactions occurring in the flowfield.
Kurylo, J., Dwyer, H.A., Oppenheim, A.K.
openaire   +1 more source

Numerical simulation of the influence of pipe length on explosion flame propagation in open-ended and close-ended pipes

Science Progress, 2020
The pipeline length exerts great influence on flame propagation characteristics, Realizable k − ε model and Premixed combustion model were used to study the influence of pipe length on propane-air explosion flame in open-ended and close-ended pipes ...
Xue Li, Ning Zhou, Xuanya Liu, Weiqiu Huang, Bing Chen, Vamegh Rasouli   +5 more
doaj   +1 more source

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

Influence of hydrodynamic processes on apparent flame velocity in accidental explosions [PDF]

E3S Web of Conferences, 2023
The main impact factor of an accidental explosion is explosive pressure, the numerical value of which is determined by the magnitude of the apparent flame velocity during explosive combustion of an explosive mixture.
Komarov Aleksandr, Gromov Nikolai, Korolchenko Anton   +2 more
doaj   +1 more source

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

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