Results 31 to 40 of about 1,396,030 (264)

Effect of Stretch on Local Burning Velocity of Premixed Turbulent Flames

Journal of Thermal Science and Technology, 2007
The effect of positive stretch on the local flame properties of turbulent propagating flames in the flamelet regime was investigated experimentally for methane-, hydrogen- and propane-air mixtures with lean and rich having nearly the same laminar burning
Masaya NAKAHARA, Hiroyuki KIDO, Takamori SHIRASUNA, Koichi HIRATA   +3 more
doaj   +1 more source

Effects of hydrogen addition and turbulence on ignition and meso-scale flames of propane mixtures

Journal of Thermal Science and Technology, 2022
This study has investigated experimentally the effects of hydrogen addition and turbulence on the ignition and the flame-kernel development characteristics in isotropic and homogeneous turbulence for propane mixtures.
Masaya NAKAHARA, Kodai TANIMOTO, Hisanobu KUDO, Yuta MARUYAMA, Fumiaki ABE   +4 more
doaj   +1 more source

A new equivalent method to obtain the stoichiometric fuel-air cloud from the inhomogeneous cloud based on FLACS-dispersion

Theoretical and Applied Mechanics Letters, 2018
: The fuel-air cloud resulting from an accidental discharge event is normally irregular in shape and varying in concentration. Performance of dispersion simulations using the computational fluid dynamics (CFD)-based tool FLACS can get an uneven and ...
Yulong Zhang, Yuxin Cao, Lizhi Ren, Xuesheng Liu   +3 more
doaj   +1 more source

Effects of Mean Inflow Velocity and Droplet Diameter on the Propagation of Turbulent V-Shaped Flames in Droplet-Laden Mixtures

Fluids, 2020
Three-dimensional carrier phase Direct Numerical Simulations of V-shaped n-heptane spray flames have been performed for different initially mono-sized droplet diameters to investigate the influence of mean flow velocity on the burning rate and flame ...
Gulcan Ozel Erol, Nilanjan Chakraborty
doaj   +1 more source

Determination of 12 Combustion Products, Flame Temperature and Laminar Burning Velocity of Saudi LPG Using Numerical Methods Coded in a MATLAB Application

Energies, 2023
The characterization of a specific fuel has always been an important point for developing and designing new components or systems with the maximum efficient possible. Studying the laminar burning velocity can lay a necessary prerequisite for the accurate
Roberto Franco Cisneros, Freddy Jesús Rojas   +1 more
doaj   +1 more source

The relation between flame surface area and turbulent burning velocity in statistically planar turbulent stratified flames

, 2020
The relation between turbulent burning velocity and flame surface area for turbulent stratified flames has been analyzed using a direct numerical simulation database.
Peter Brearley, U. Ahmed, N. Chakraborty
semanticscholar   +1 more source

Turbulent Flames Speeds and Laminar Burning Velocities of Dusts using the ISO 1 m³ Dust Explosion Method

Chemical Engineering Transactions, 2014
The ISO 1 m3 dust explosion vessel was instrumented with thermocouples acting as flame detectors. These were used with methane/air gas explosions to show that the explosion flame was spherical in the constant pressure phase of the explosion and that a ...
H. Sattar, G.E. Andrews, H.N. Phylaktou, B.M. Gibbs   +3 more
doaj   +1 more source

Improvement of Turbulent Burning Velocity Measurements by Schlieren Technique, for High Pressure Isooctane-Air Premixed Flames

Combustion Science and Technology, 2020
As in most industrial cases, the expansion of premixed flames in spark-ignition (SI) engines is strongly affected by turbulence flow fields. However, as the flame radius and curvature are non-negligible during combustion development, the global stretch ...
P. Bréquigny, Charles Endouard, F. Foucher, C. Mounaïm-Rousselle   +3 more
semanticscholar   +1 more source

Closure Relations for Fluxes of Flame Surface Density and Scalar Dissipation Rate in Turbulent Premixed Flames

Fluids, 2019
In this study, closure relations for total and turbulent convection fluxes of flame surface density and scalar dissipation rate were developed (i) by placing the focus of consideration on the flow velocity conditioned to the instantaneous flame within ...
Andrei N. Lipatnikov, Shinnosuke Nishiki, Tatsuya Hasegawa   +2 more
doaj   +1 more source

Cracking the Code: Which Ocular Symptoms Predict Dry Eye Signs? Insights From a Large International Sicca Registry

Arthritis Care &Research, EarlyView.
Objective The study aimed to identify symptom‐based predictors of dry eye disease (DED) signs in the Sjögren's International Collaborative Clinical Alliance (SICCA) cohort. Methods We performed a retrospective analysis examining 16 ocular symptoms (most graded 0–4) and artificial tear (AT) use (graded 0–3) as predictors of DED signs (abnormal ocular ...
Pragnya R. Donthineni, Chloe Shields, Rohit Muralidhar, Shreya Bhatt, Alan Baer, Robert Fox, Sara S. McCoy, Anat Galor   +7 more
wiley   +1 more source