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Effects of Composition Heterogeneities on Flame Kernel Propagation: A DNS Study
Fluids, 2020 In this study, a new set of direct numerical simulations is generated and used to examine the influence of mixture composition heterogeneities on the propagation of a premixed iso-octane/air spherical turbulent flame, with a representative chemical ...
Aimad Er-raiy +2 more
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The “turbulent flame speed” of wrinkled premixed flames
Comptes Rendus. Mécanique, 2012 The determination of the turbulent flame speed is a central problem in combustion theory. Early studies by Damköhler and Shelkin resorted to geometrical and scaling arguments to deduce expressions for the turbulent flame speed and its dependence on turbulence intensity.
Moshe Matalon, CRETA, Francesco
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Effect of CH4–Air Ratios on Gas Explosion Flame Microstructure and Propagation Behaviors
Energies, 2012 To reveal the inner mechanism of gas explosion dynamic behavior affected by gas equivalent concentration, a high speed Schlieren image system and flow field measurement technology was applied to record the gas explosion flame propagation and flame ...
Ying Zhang, Yin Zhang, Xianfeng Chen
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Large Eddy Simulation of a Turbulent Spray Jet Flame Using Filtered Tabulated Chemistry
Journal of Combustion, 2020 This work presents Large Eddy Simulations of the unconfined CORIA Rouen Spray Burner, fed with liquid n-heptane and air. Turbulent combustion modeling is based on the Filtered TAbulated Chemistry model for LES (F-TACLES) formalism, designed to capture ...
Adrien Chatelier +3 more
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Ultra-Lean Premixed Turbulent Combustion: Challenges of RANS Modelling
Energies, 2022 The main challenge of improving spark ignition (SI) engines to achieve ever increasing thermal efficiencies and near-zero pollutant emissions today concerns developing turbulent combustion under homogeneous ultra-lean premixed mixtures (HULP).
Lorenzo Sforza +3 more
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Scaling of turbulent flame speed for expanding flames with Markstein diffusion considerations [PDF]
Physical Review E, 2013 In this paper we clarify the role of Markstein diffusivity, which is the product of the planar laminar flame speed and the Markstein length, on the turbulent flame speed and its scaling, based on experimental measurements on constant-pressure expanding turbulent flames.
Swetaprovo, Chaudhuri +2 more
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Fire, 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
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Frontiers in Energy Research, 2022 The thermal safety of building façade energy conservation materials is commonly affected by the wind in the surrounding environment. In addition, multiple fire sources might be formed because of the secondary ignition of the primary fire source.
Wei Zhang, Jingwei Wang
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Influence of Turbulent Scalar Mixing Physics on Premixed Flame Propagation
Journal of Combustion, 2011 The influence of reactive scalar mixing physics on turbulent premixed flame propagation is studied, within the framework of turbulent flame speed modelling, by comparing predictive ability of two algebraic flame speed models: one that ...
H. Kolla, N. Swaminathan
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Experimental and computational investigation of flame holders in combustion chambers at different th
Journal of Thermal Engineering, 2020 The effect on the dynamic stability of combustors with and without flame holders were investigated experimentally and computationally with thermal loads of 3, 5, and 9 kW.
Mohammed Kh Abbas ALHUMAİRİ +2 more
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