Results 1 to 10 of about 2,511 (241)
Flame extinctions: Critical stretch rates and sizes [PDF]
Combustion and Flame, 2020 The paper reports how experimental data from a fan-stirred explosion vessel have extended the boundary of the previously defined regime, within which stable premixed turbulent combustion occurs. It also defines the properties of the bordering regime of turbulent flame quenching.
Pervez Ahmed +2 more
exaly +3 more sources
Numerical Study on Chemical Kinetic Characteristics of Counterflow Diffusion Flame Extinction of Methane/Ammonia/Air Flame under High Pressure or Air Preheating Temperature [PDF]
MoleculesGreen 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 +3 more
doaj +2 more sources
Stretch rate effects and flame surface densities in premixed turbulent combustion up to 1.25 MPa [PDF]
Combustion and Flame, 2015 Independent research at two centres using a burner and an explosion bomb has revealed important aspects of turbulent premixed flame structure. Measurements at pressures and temperatures up to 1.25 MPa and 673 K in the two rigs were aimed at quantifying the influences of flame stretch rate and strain rate Markstein number, Masr, on both turbulent ...
Audrius Bagdanavicius +2 more
exaly +4 more sources
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 +5 more
doaj +1 more source
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 +3 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 +2 more
doaj +1 more source
Predicting the consumption speed of a premixed flame subjected to unsteady stretch rates [PDF]
Progress in Canadian Mechanical Engineering, 2018 The stretched laminar flame model provides a convenient approach to embed realistic chemical kinetics when simulating turbulent premixed flames. When positive-only periodic strain rates are applied to a laminar flame there is a notable phase lag and diminished amplitude in heat release rate. Similar results have being observed with respect to the other
Meysam Sahafzadeh +2 more
openaire +5 more sources
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
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 +6 more
doaj +1 more source
Energies, 2021 Moderate or intense low-oxygen dilution (MILD) combustion is a novel combustion technique that can simultaneously improve thermal efficiency and reduce emissions.
Hazem S.A.M. Awad +3 more
doaj +1 more source