Results 11 to 20 of about 760,958 (323)

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

open access: yesFluids, 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

Analysis of flame acceleration induced by wall friction in open tubes [PDF]

open access: yes, 2010
Spontaneous flame acceleration leading to explosion triggering in open tubes/channels due to wall friction was analytically and computationally studied.
Akkerman, V.   +3 more
core   +1 more source

Dynamics of Laterally Propagating Flames in X-ray Bursts. I. Burning Front Structure [PDF]

open access: yes, 2019
We investigate the structure of laterally-propagating flames through the highly-stratified burning layer in an X-ray burst. Two-dimensional hydrodynamics simulations of flame propagation are performed through a rotating plane-parallel atmosphere ...
Cavecchi, Yuri   +5 more
core   +2 more sources

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

open access: yesJournal 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   +8 more
doaj   +1 more source

Experimental and numerical study of the accuracy of flame-speed measurements for methane/air combustion in a slot burner [PDF]

open access: yes, 2011
Measuring the velocities of premixed laminar flames with precision remains a controversial issue in the combustion community. This paper studies the accuracy of such measurements in two-dimensional slot burners and shows that while methane/air flame ...
Ferret, Bernard   +2 more
core   +1 more source

Quasi-steady stages in the process of premixed flame acceleration in narrow channels [PDF]

open access: yes, 2013
The present paper addresses the phenomenon of spontaneous acceleration of a pre-mixed flame front propagating in micro-channels, with subsequent deflagration-to-detonation transition. It has recently been shown experimentally [M. Wu, M. Burke, S.
Akkerman, V.   +4 more
core   +2 more sources

Upward flame spread over corrugated cardboard [PDF]

open access: yes, 2011
As part of a study of the combustion of boxes of commodities, rates of upward flame spread during early-stage burning were observed during experiments on wide samples of corrugated cardboard.
Gollner, MJ, Rangwala, AS, Williams, FA
core   +2 more sources

Numerical simulation of flame acceleration and deflagration-to-detonation transition in hydrogen-air mixtures with concentration gradients [PDF]

open access: yes, 2017
The present study aims to test the capability of our newly developed density-based solver, ExplosionFoam, for flame acceleration (FA) and deflagration-to-detonation transition (DDT) in mixtures with concentration gradients which is of important safety ...
Wang, C.J., Wen, Jennifer X.
core   +1 more source

Flame Acceleration Enhancement by Distributed Ignition Points

open access: yesJournal of Propulsion and Power, 2005
This paper reports on the investigation of a novel method for promoting flame acceleration leading to detonation initiation in a tube. A common method used to initiate a detonation wave is via flame acceleration in an obstacle laden tube. Previous studies with fuel-air mixtures have shown that the measured detonation run-up distance, and corresponding ...
Ciccarelli, Gaby   +2 more
openaire   +2 more sources

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

open access: yesE3S 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   +2 more
doaj   +1 more source

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