Results 11 to 20 of about 1,995,636 (179)
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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Turbulent flame development in a high-pressure combustion vessel [PDF]
, 2005 The objective of this work was to extend the range of turbulent burning velocities presented in the literature by performing new measurements at elevated pressures over a range of turbulent velocities, u' (r. m. s. deviation from the mean velocity).
Ormsby, Matthew P.
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Turbulent Premixed Flame Kernel Growth During The Early Stages Using Direct Numerical Simulation [PDF]
, 2008 In this thesis Direct Numerical Simulation (DNS) is used to investigate the development of turbulent premixed flame kernels during the early stages of growth typical of the period following spark ignition.
Dunstan, T. D.
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Self-Turbulent Flame Speeds [PDF]
Flow, Turbulence and Combustion, 2011 This paper reports an experimental investigation of premixed propane andmethane-air flames propagating freely in tubes 1.5 m long and with diameters rangingfrom 26 to 141 mm. The thermo-acoustic instability was eliminated by means of anovel acoustic absorber placed at the closed end of the tube.
Quinard, Joel +3 more
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Variation of Flame Displacement Speed in a Turbulent Premixed Flame [PDF]
Australasian Fluid Mechanics Conference (AFMC), 2020 Modelling of the flame displacement speed is of interest in many Large Eddy Simulation (LES) frameworks including the Flame Surface Density approach. In this study, a Direct Numerical Simulation (DNS) dataset is used to calculate the displacement speed in a premixed, methane–air, round jet flame in the thin reaction zone (TRZ) regime.
Panek, Pavel +3 more
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Statistics of local and global flame speed and structure for highly turbulent H2/air premixed flames [PDF]
, 2020 A statistical analysis is conducted for turbulent hydrogen-air premixed flames at a range of Karlovitz numbers up to 1,126 by direct numerical simulations (DNS) with detailed chemistry.
Song, Wonsik +3 more
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Lewis Number Effects on Flame Speed Statistics in Spherical Turbulent Premixed Flames [PDF]
Flow, Turbulence and Combustion, 2020 AbstractThe influences of characteristic Lewis number$$ \hbox{Le} $$Leon the statistics of density-weighted displacement speed and consumption speed in spherically expanding turbulent premixed flames have been analysed using three-dimensional direct numerical simulations data for$$ \hbox{Le} = 0.8 $$Le=0.8, 1.0 and 1.2 under statistically similar flow ...
G Ozel-Erol +2 more
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Statistical description of turbulent reacting media [PDF]
, 2002 Present work concerns the interaction of chemistry and turbulence in a turbulent reacting flow. Both self-ignition and flame propagation are studied.
Liu, Kexin
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Measurement of turbulent flame speed of natural gas/air mixtures at elevated pressure [PDF]
, 2010 Turbulent flame speeds were measured over a range of pressures to 0.8 MPa using a jet flow apparatus fired with a synthetic mixture representing a mid-European natural gas. The equivalence ratio empty set was 0.9.
Witton, John J. +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
doaj +1 more source