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Numerical Study on Chemical Kinetic Characteristics of Counterflow Diffusion Flame Extinction of Methane/Ammonia/Air Flame under High Pressure or Air Preheating Temperature [PDF]

Molecules
Green ammonia has become an increasingly popular fuel in recent years because of its combustion process without carbon oxide release. Adding ammonia to methane fuel for co-combustion has become one of the important research topics in the current ...
Ying Chen, Jingfu Wang, Jian Zhang, Yi Li   +3 more
doaj   +2 more sources

The effects of flame orientation and mean shear on flame stretch in highly turbulent premixed flames using DNS

Applications in Energy and Combustion Science, 2022
In the present work, direct numerical simulation data of a laboratory-scale high Karlovitz number (Ka) jet flame with a strong mean shear and a high Ka freely propagating planar flame without a mean shear were analyzed to explore the influence of flame ...
Tingquan Tian, Haiou Wang, Kun Luo, Jianren Fan   +3 more
doaj   +1 more source

Experimental analysis on micro diffusion flames formed by oxygen combustion of H2-CO2 mixture using counterflow burners

Journal of Thermal Science and Technology, 2022
Microscale hydrogen (H2) combustion is one of the promising technologies for renewable miniaturized heat sources. This study analyzes the oxygen combustion of H2 in small-scale counterflow burners, with carbon dioxide (CO2) added for safe hydrogen ...
Daisuke SATO, Shuta NAKACHI, Kaito HONDA, Keisuke OBU, Toshiyuki KATSUMI, Satoshi KADOWAKI   +5 more
doaj   +1 more source

Flow field and local burning velocity affected by stretch in swirl flow of turbulent premixed flames

Journal of Thermal Science and Technology, 2022
In this study, we have investigated turbulent premixed flames affected by local stretch in a swirl flow, measured by the simultaneous OH-PLIF/SPIV system. Evaluating the transient of burning velocity and stretch rate, the flow and the flame dynamics in a
Kazuhiro YAMAMOTO, Kenta YAMAMORI, Hiromu SUZUKI   +2 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

Hydrodynamic effect of nanosecond repetitively pulsed discharges produced throughout a laminar stagnation flame

Applications in Energy and Combustion Science, 2023
Plasma-assisted combustion has the potential to improve flame stability and combustion performance. Among all the different types of plasma source, nanosecond repetitively pulsed (NRP) discharges have received a lot of attention since they can produce ...
Julien Lambert, Sylvain Coulombe, Gilles Bourque, Jeffrey Bergthorson   +3 more
doaj   +1 more source

Oxygen combustion of CH4-CO2 mixture in a small-scale counterflow burner

Journal of Thermal Science and Technology, 2018
Oxygen combustion of CH4-CO2 mixture in a small-scale counterflow burner was studied. A diffusion flame was stabilized in the gap between opposed ports ejecting fuel and oxygen gases, and its thickness which depended on the gap distance between burner ...
Satoshi KADOWAKI, Kota KOHATSU, Kazuki UEHARA, Toshiyuki KATSUMI, Thwe Thwe Aung, Masataro SUZUKI   +5 more
doaj   +1 more source

Effects of inert-gas addition on the dynamic behavior and propagation characteristics of spherically expanding hydrogen-air flames

Journal of Thermal Science and Technology, 2023
To investigate the effects of inert-gas addition on the dynamic behavior and propagation characteristics of spherically expanding hydrogen-air flames, the experiments of premixed combustion were performed in a closed chamber.
Toshiyuki KATSUMI, Masashi KUMADA, Haruki NOGUCHI, Atsushi ZENBA, Daisuke SATO, Hiroshi YAMAGATA, Satoshi KADOWAKI   +6 more
doaj   +1 more source

Characteristics of biogas-oxygen micro counterflow diffusion flames

Nihon Kikai Gakkai ronbunshu, 2015
The characteristics of biogas-oxygen diffusion flames were experimentally investigated using small counterflow burners, where the apparent equivalence ratio was set to unity.
Satoshi KADOWAKI, Go OKUMURA, Ryutaro NUMATA, Toshiyuki KATSUMI   +3 more
doaj   +1 more source

Influences of stretch and curvature on the temperature of stretched cylindrical diffusion flames

Journal of Thermal Science and Technology, 2016
The structure of a counterflow-type cylindrical diffusion flame was studied experimentally to determine the effect of stretch and curvature. The cylindrical flame used in this study had a concave curvature with respect to the fuel stream.
Yosuke SUENAGA, Hideki YANAOKA, Daisuke MOMOTORI   +2 more
doaj   +1 more source