Results 21 to 30 of about 3,851 (240)

Experimental observation of the TJI-initiated HPDI gas combustion: Vertically crossed flame jet and methane jet

open access: yesApplications in Energy and Combustion Science, 2023
In the field of natural gas marine engines, the high-pressure direct injection (HPDI) technology is widely used to achieve emission reduction while maintaining equivalent thermal efficiency and power output compared to diesel engines.
Lijia Zhong   +3 more
doaj   +1 more source

Experimental assessment of the impact of variation in jet fuel properties on spray flame liftoff height

open access: yesApplications in Energy and Combustion Science, 2021
Ensuring efficient and clean combustion performance of liquid-fueled engines requires comprehension of the influence of fuel composition and properties on flame behavior, such as flame liftoff height (LOH) and lean blowout limit (LBO).
Radi Alsulami   +4 more
doaj   +1 more source

Characterization of the effects of a plasma injector driven by AC dielectric barrier discharge on ethylene-air diffusion flame structure

open access: yesOpen Physics, 2020
A dielectric barrier discharge plasma controlled diffusion flame experimental system was built based on the designed coaxial swirling plasma injector. The air plasma was generated within the annulus gap of the injector by alternating current dielectric ...
Zheng Zhi   +6 more
doaj   +1 more source

Improving combustion performance of swirling double-concentric jets flames with rich equivalence ratios

open access: yesCase Studies in Thermal Engineering, 2020
The acoustic excitation method was used to improve the combustion performance of rich-combustion flames of swirling dual-disk double-concentric jets. The unexcited and excited conditions were compared.
Omid Ali Zargar
doaj   +1 more source

Observations on Jet-Flame Blowout [PDF]

open access: yesInternational Journal of Reacting Systems, 2008
The mechanisms that cause jet-flame blowout, particularly in the presence of air coflow, are not completely understood. This work examines the role of fuel velocity and air coflow in the blowout phenomenon by examining the transient behavior of the reaction zoneat blowout.
N. J. Moore, J. L. McCraw, K. M. Lyons
openaire   +1 more source

Numerical Investigation of the Effects of Diffusion Time on the Mechanisms of Transition from a Turbulent Jet Flame to Detonation in a H2-Air Mixture

open access: yesFire, 2023
The current study primarily aimed to simulate detonation initiation via turbulent jet flame acceleration in partial-premixed H2-air mixtures. Different vertical concentration gradients were generated by varying the duration of hydrogen injection ...
Mohammad Hossein Shamsaddin Saeid   +3 more
doaj   +1 more source

Improvement of Laminar Lifted Flame Stability Excited by High-Frequency Acoustic Oscillation

open access: yesJournal of Thermal Science and Technology, 2009
A high-frequency (20kHz) standing wave was applied to the unburned mixture upstream of a methane-air lifted jet flame using a bolt-clamped Langevin transducer (BLT) to improve stability.
Mitsutomo HIROTA   +3 more
doaj   +1 more source

Numerical Investigation on the Jet Characteristics and Combustion Process of an Active Prechamber Combustion System Fueled with Natural Gas

open access: yesEnergies, 2022
An active prechamber turbulent ignition system is a forced ignition method for internal combustion engines fueled with low reactivity fuels, i.e., natural gas and gasoline, which could expand the lean-burn limit, promote flame propagation, and ensure ...
Lina Xu   +4 more
doaj   +1 more source

Anchoring of premixed jet flames in vitiated crossflow with pulsed nanosecond spark discharge

open access: yesApplications in Energy and Combustion Science, 2020
This paper deals with the effect of non-equilibrium plasma on the anchoring of a premixed jet flame in hot vitiated crossflow at atmospheric pressure. The turbulent vitiated crossflow was generated by an array of 4×4 premixed turbulent jet flames burning
Sergey Shcherbanev   +6 more
doaj   +1 more source

INVESTIGATION OF FLAME STRETCH IN TURBULENT LIFTED JET FLAME [PDF]

open access: yesCombustion Science and Technology, 2014
DNS data of a laboratory-scale turbulent lifted hydrogen jet flame has been analyzed to show that this flame has mixed mode combustion not only at the flame base but also in downstream locations. The mixed mode combustion is observed in instantaneous structures as in earlier studies and in averaged structure, in which the predominant mode is found to ...
Ruan, S, Swaminathan, N, Mizobuchi, Y
openaire   +2 more sources

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