Results 11 to 20 of about 1,020 (262)
Turbulent Premixed Combustion in SI Engine
Diyala Journal of Engineering Sciences, 2018 The turbulent lean premixed combustion simulation is implemented in 4- stroke spark ignition (SI) engine. The Turbulent Flame speed Closure model (TFC) is used in different turbulent flow conditions.
Mohammed Alhumairi, Sami A. Nawi
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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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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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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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Combustion Science and Technology, 2023 This study investigates turbulent flame speed and turbulent Markstein length using analytic and numerical methods. Using asymptotic analysis on harmonically oscillating flames, explicit expressions for the un-stretched turbulent flame speed and the turbulent Markstein length are derived.
Sohn, Jungho +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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Energies, 2021 Turbulent combustion modelling in internal combustion engines (ICEs) is a challenging task. It is commonly synthetized by incorporating the interaction between chemical reactions and turbulent eddies into a unique term, namely turbulent flame speed sT ...
Alessandro d’Adamo +2 more
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