Results 1 to 10 of about 22,748 (235)

Flame trajectory of a non-vertical turbulent buoyant jet flame

open access: goldApplications in Energy and Combustion Science, 2021
This paper presents a theoretical and experimental study on the flame trajectory of a non-vertical turbulent diffusion flame in still air. A series of propane turbulent flame tests (inner diameter of the burner: d=13 mm) with different initial Froude ...
Wei Gao   +4 more
doaj   +3 more sources

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 [PDF]

open access: goldFire, 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   +2 more sources

Turbulent Superstructures in Inert Jets and Diffusion Jet Flames [PDF]

open access: yesFluids, 2021
An experimental study of spatially localized very large-scale motion superstructures, propagating in a jet of carbon dioxide at low Reynolds numbers, was carried out.
Vadim Lemanov   +2 more
doaj   +2 more sources

Modelling of turbulent lifted jet flames using flamelets: a priori assessment and a posteriori validation [PDF]

open access: green, 2014
This study focuses on the modelling of turbulent lifted jet flames using flamelets and presumed PDF approach with interests on both flame lift-off height and flame brush structure.
Darbyshire, O, Ruan, S, Swaminathan, N
core   +4 more sources

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 analysed to show that this flame has mixed mode combustion not only at the flame base but also in downstream locations.
Mizobuchi, Y, Ruan, S, Swaminathan, N
core   +5 more sources

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

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

Numerical analysis on combustion characteristics of diffusion jet flame under different gravity environments

open access: yesCase Studies in Thermal Engineering, 2023
To study the combustion characteristics of turbulent jet flames under different gravity environments, the centerline temperature distribution curve and air entrainment rate of turbulent jet flame from microgravity to hyper gravity was carried out by CFD ...
Yang Gao   +6 more
doaj   +1 more source

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

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