Does Density Ratio Significantly Affect Turbulent Flame Speed?

A numerical study of turbulent flame speed models for H2/CH4/Air premixed combustion

This study has assessed the validity of the commercially available turbulent flame speed models within ANSYS Fluent as applied to hydrogen/methane/air combustion, with 5 different fuel compositions considered from 100% methane to 100% hydrogen. It was found that existing turbulent flame speed models were capable of producing accurate predictions up to 60% hydrogen with the Zimont model being th...

Correlation of Flame Speed with Stretch in Turbulent Premixed Methane/air Flames

Direct numerical simulations of two-dimensional unsteady premixed methane/air flames are performed to determine the correlation of flame-speed with stretch over a wide range of curvatures and strain rates generated by intense two-dimensional turbulence. Lean and stoichiometric premixtures are considered with a detailed C1-mechanism for methane oxidation. The computed correlation shows the exist...

Turbulent Burning, Flame Acceleration, Explosion Triggering

.......................................................................... iii Sammanfattning ..................................................................... iv List of publication ............................................................... v Acknowledgments ............................................................... vii

Turbulent Flame Velocity Model for SI Engine

A new model for turbulent flame velocity of premixed flame in spark ignition engine for Iso-octane air mixture has been developed and validated for a wide range of engine operating parameters. The model developed is a zero dimensional thermodynamic model. The effects of engine speed (600-1160 rpm), equivalence ratio (0.7-1.1), unburnt mixture temperature (532650 Rankine), compression ratio (5-8...

Part III Swirl Stabilized Turbulent Flame Dynamics