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Effect of CH4–Air Ratios on Gas Explosion Flame Microstructure and Propagation Behaviors [PDF]

open access: yesEnergies, 2012
To reveal the inner mechanism of gas explosion dynamic behavior affected by gas equivalent concentration, a high speed Schlieren image system and flow field measurement technology was applied to record the gas explosion flame propagation and flame ...
Ying Zhang, Yin Zhang, Xianfeng Chen
doaj   +4 more sources

Self-Turbulent Flame Speeds [PDF]

open access: yesFlow, Turbulence and Combustion, 2011
This paper reports an experimental investigation of premixed propane andmethane-air flames propagating freely in tubes 1.5 m long and with diameters rangingfrom 26 to 141 mm. The thermo-acoustic instability was eliminated by means of anovel acoustic absorber placed at the closed end of the tube.
Quinard, Joel   +3 more
openaire   +3 more sources

Flame front geometry in premixed turbulent flames [PDF]

open access: yesSymposium (International) on Combustion, 1992
Experimental and numerical determinations of flame front curvature and orientation in premixed turbulent flames are presented. The experimental data is obtained from planar, cross sectional images of stagnation point flames at a high Damkohler number (80) and turbulent Reynolds number of 60.
Shepherd, I. G., Ashurst, W. T.
openaire   +2 more sources

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

open access: yesEnergies, 2022
The relationship between the flow field and flame propagation is essential in determining the dynamics and effects of turbulent flow in an optical SI engine.
Yuji Ikeda
doaj   +1 more source

Effect of Temperature Conditions on Flame Evolutions of Turbulent Jet Ignition

open access: yesEnergies, 2021
Turbulent jet ignition technology can significantly improve lean combustion stability and suppress engine knocking. However, the narrow jet channel between the pre-chamber and the main chamber leads to some difficulties in heat exchange, which ...
Jiaying Pan   +5 more
doaj   +1 more source

The interaction of high-speed turbulence with flames: Turbulent flame speed [PDF]

open access: yesCombustion and Flame, 2011
44 pages, 20 figures; published in Combustion and ...
Poludnenko, Alexei Y., Oran, Elaine S.
openaire   +2 more sources

Three-Dimensional Direct Numerical Simulation of Near-Field Ozone-Enhanced Lean Premixed Syngas Turbulent Jet Flame

open access: yesEnergies, 2022
Due to its enhancement in the flame speed, ozone added in lean premixed syngas turbulent jet flame was investigated by the three-dimensional direct numerical simulation method in the near field of the flame.
Cong Xu   +5 more
doaj   +1 more source

Analysis of Turbulent Burning Velocity of Spherically Propagating Premixed Flame with Effective Turbulence Intensity

open access: yesJournal of Thermal Science and Technology, 2012
Burning velocity of spherically propagating turbulent flames kept increasing with flame propagation. On the other hand, turbulent burning velocity obtained from burner stabilized flame is constant for a given turbulence intensity.
Akihiro HAYAKAWA   +3 more
doaj   +1 more source

RANS- and TFC-Based Simulation of Turbulent Combustion in a Small-Scale Venting Chamber

open access: yesEnergies, 2021
A laboratory-scale chamber is convenient for combustion scenarios in the practical analysis of industrial explosions and devices such as internal combustion engines.
Justina Jaseliūnaitė   +2 more
doaj   +1 more source

Propagation Properties of Turbulent Premixed Flames Neutral for Thermo-Diffusive Effects

open access: yesInternational Journal of Automotive Engineering, 2020
Burning velocity is one of the important properties of premixed turbulent flames. Premixed turbulent flames are, in general, subjected to the thermo-diffusive effects in addition to the increase in the flame front area due to the influence of turbulence.
Toshiaki Kitagawa   +4 more
doaj   +1 more source

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