Results 21 to 30 of about 279 (180)

Counterflow flame extinction of ammonia and its blends with hydrogen and C1-C3 hydrocarbons

Applications in Energy and Combustion Science, 2022
Ammonia as a fuel offers the potential to avoid carbon emissions, but its combustion is hindered by low reactivity. Here, the extinction limits of NH3 and NH3 plus reactivity enhancers were measured in the counterflow laminar non-premixed flames.
Adamu Alfazazi, Et-touhami Es-sebbar, Xiaoyuan Zhang, Bassam Dally, Marwan Abdullah, Mourad Younes, S. Mani Sarathy   +6 more
doaj   +1 more source

Observation of droplet behavior of emulsified fuel in secondary atomization in flame

Journal of Thermal Science and Technology, 2014
The study aims to visualize droplet behaviors of emulsified fuel in secondary atomization in a flame stabilized in a laminar counterflow field. To study secondary atomization characteristics in the flame, direct photography of the flame using a color ...
Hirotatsu WATANABE, Yutaka SHOJI, Takuma YAMAGAKI, Jun HAYASHI, Fumiteru AKAMATSU, Ken OKAZAKI   +5 more
doaj   +1 more source

Visualization of the soot formation process in the volatile flame of single coal particle using 10-kHz PAHs-PLIF, LII and LIS

Nihon Kikai Gakkai ronbunshu, 2021
Soot formation process during coal combustion is one of a key phenomenon to achieve a high-performance furnace. This is because the thermal radiation of soot influences the temperature distribution and the heat transfer process in the furnaces.
Shinya SAWADA, Daisuke OKADA, Noriaki NAKATSUKA, Kazuki TAINAKA, Tsukasa HORI, Jun HAYASHI, Fumiteru AKAMATSU   +6 more
doaj   +1 more source

Extinction behavior of addition of PMMA powder into counterflow diffusion flame of methane and nitrogen and high temperature air

Nihon Kikai Gakkai ronbunshu, 2020
A counter-flow diffusion flame formed of a fuel consisting of methane and nitrogen, and a oxidizer of air heated to 500℃ was applied to clarify the influence on the extinction limit when fine powder of polymethyl methacrylate (PMMA) was added to the fuel.
Hironao HANAI, Toshiki SUDA
doaj   +1 more source

Planar Light Extinction Measurement of Soot Volume Fraction in Laminar Counterflow Diffusion Flames

Frontiers in Mechanical Engineering, 2021
A cost-effective and straightforward light extinction method has been extensively used for measurement of soot volume fraction (SVF) in sooting flames.
Jiwei Zhou, Jiwei Zhou, Mengxiang Zhou, Mengxiang Zhou, Liuhao Ma, Liuhao Ma, Yu Wang, Yu Wang   +7 more
doaj   +1 more source

Cellular structures of laminar lean premixed H2/CH4/air polyhedral flames

Applications in Energy and Combustion Science, 2023
Fundamental studies on the effects of differential diffusion of hydrogen (H2) on flame structure are motivated as the high diffusivity of H2 presents challenges for the modeling and optimization of combustion systems.
Shuguo Shi, Adrian Breicher, Johannes Trabold, Sandra Hartl, Robert S. Barlow, Andreas Dreizler, Dirk Geyer   +6 more
doaj   +1 more source

Numerical analysis of the unsteady transition of multiple laminar methanol/air spray flame structures in the counterflow configuration

Applications in Energy and Combustion Science
The counterflow configuration is a well-established setting to study the structure of laminar spray flames. Typically, the similarity transformation is introduced to transfer the two-dimensional gas-phase equations into one-dimensional governing ...
Jiawei Wan, Eva Gutheil
doaj   +1 more source

Stability and Blowout Behavior of Jet Flames in Oblique Air Flows

Journal of Combustion, 2012
The stability limits of a jet flame can play an important role in the design of burners and combustors. This study details an experiment conducted to determine the liftoff and blowout velocities of oblique-angle methane jet flames under various air ...
Jonathan N. Gomes, James D. Kribs, Kevin M. Lyons   +2 more
doaj   +1 more source

The Effects of Cracking Ratio on Ammonia/Air Non-Premixed Flames under High-Pressure Conditions Using Large Eddy Simulations

Energies, 2023
Ammonia is a promising carbon-free fuel. However, one of the main challenges for ammonia combustion is the high level of NO emissions. In this study, simulations were conducted for ammonia/air laminar counterflow flames and turbulent non-premixed jet ...
Chengming Wang, Haiou Wang, Kun Luo, Jianren Fan   +3 more
doaj   +1 more source

Effect of HBr on Explosion Limits of Stoichiometric Hydrogen‐oxygen Mixture

International Journal of Chemical Kinetics, Volume 58, Issue 9, Page 646-657, September 2026.
ABSTRACT This work, based on numerical simulations, discusses the effect of HBr as an inhibitor on the explosion limit of stoichiometric hydrogen‐oxygen gas mixture in a closed spherical vessel. The numerical simulation solves the complete governing equations for mass, momentum, species and energy.
Chunkan Yu, Peter Glarborg
wiley   +1 more source