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Showing 1 to 7 of 7 for “"flame surface density"”.
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Flame Surface Density Measurements and Curvature Statistics for Turbulent Premixed Bunsen Flames
… planar laser induced fluorescence (PLIF). Flame topography measurements in terms of flame surface density and curvature were calculated based on the flame front detected by the CH PLIF signal. The goal of this work was to investigate turbulent flames with extremely high turbulence intensity …
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Studies of premixed turbulent flames under flamelet assumptions
… a crucial factor in describing how fast premixed flame can burn, while it is still not well-predictable under various turbulence levels and flame conditions. A clearer definition of turbulent burning velocity based on the reaction rate will help understand the mechanism of turbulent premixed …
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Equivalence Ratio Gradient Effects on Local Flame Front Topology and Heat Release Rate in Stratified, Iso-Octane/Air Turbulent V-Flames
… premixing on the local behaviour of turbulent flames were investigated using a novel rectangular slot burner that could generate controlled, transverse variations in mixture strength along its exit plane. Turbulent, iso-octane/air V-flames were anchored in reactant mixtures of varying mean …
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DNS of inhomogeneous reactants premixed combustion
… on the interactions of an initially planar flame with field of inhomogeneous reactants. Unsteady and unstrained laminar methane-air flames are studied in one- and two-dimensional simulations to investigate the effects of normally and tangentially (to the flame surface) stratified reactants. …
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Measurements of the structure of turbulent premixed and stratified methane/air flames
… test cases for existing and emerging turbulent flame models, covering a range of u'/sL from 1 to 10, turbulence intensities from 5% to 60%, and stratification ratios from 1 to 3. Simultaneous Rayleigh/Raman/CO-LIF measurements of temperature and major species concentrations - CH4, CO2, CO, H2, …
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Fundamental studies of flame propagation in lean-burn natural gas engines
… characteristic time required for steady premixed flame propagation has three components: time for autoignition to occur, time for peak temperature to be achieved following autoignition, and time for steady flame propagation in the premixed fuel/air mixture to be achieved. The autoignition time …
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Experimental investigation of unconfined bluff body stabilised flames with vapourised kerosene fuels
… have increasingly implemented lean premixed flames as they facilitate low NOx and soot emissions. In most modern transport vehicles, combustion occurs under highly turbulent conditions. However, stabilizing lean premixed flames within the high Reynolds number conditions of practical devices …