Results 171 to 180 of about 1,374 (210)
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Increased Speed of Premixed Laminar Flames in a Microwave Resonator
35th AIAA Plasmadynamics and Lasers Conference, 2004Long autoignition delay time and low lateral flame propagation speed are among the key problems in developing high-speed combustors for ram/scramjet engines. Plasma-assisted combustion can help to solve these problems. Estimates indicate that uniform volumetric nonequilibrium cold plasma ignition of fuel-air mixtures in ram/scramjet combustors can ...
Sohail Zaidi +5 more
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Determination of laminar flame speeds from nozzle-generated counterflow flames
2008The accuracy of the counterflow, twin-flame technique for the determination of laminar flame speeds was examined analytically and numerically. The analysis was conducted by using multiple-expansion, high activation energy asymptotics while the numerical simulation incorporated detailed chemistry and transport.
B. H. Chao, F. N. Egolfopoulos
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Laminar Flame Speed Experiments of Alternative Liquid Fuels
Journal of Engineering for Gas Turbines and Power, 2019Abstract New laminar flame speed experiments have been collected for two alternative liquid fuels. Understanding the combustion characteristics of these synthetic fuels is an important step in developing new chemical kinetics mechanisms that can be applied to real fuels.
Charles L. Keesee +2 more
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Mechanisms of Hydrocarbon Laminar Flame Speed Enhancement with Microwaves
46th AIAA Aerospace Sciences Meeting and Exhibit, 2008Advanced laser diagnostics have been performed on continuous and pulsed microwave driven laminar methane/air flames, further elucidating mechanisms that cause the observed enhancement of the flame speed and suggesting improved lower power methods to obtain the enhancement. In particular, filtered Rayleigh scattering (FRS) and particle image velocimetry
Emanuel Stockman +2 more
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Numerical assessment of accurate measurements of laminar flame speed
AIP Conference Proceedings, 2016In combustion, the laminar flame speed constitutes an important parameter that reflects the chemistry of oxidation for a given fuel, along with its transport and thermal properties. Laminar flame speeds are used (i) in turbulent models used in CFD codes, and (ii) to validate detailed or reduced mechanisms, often derived from studies using ideal ...
Goulier, Joules +4 more
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Laminar Flame Speeds of Propane-Nitrous Oxide Mixtures
47th AIAA Aerospace Sciences Meeting including The New Horizons Forum and Aerospace Exposition, 2009Mixtures of propane with nitrous oxide at various nitrogen dilution levels (N2O/(N2O + N2)) were studied to experimentally and numerically determine the adiabatic, laminar flame speed at atmospheric and near-atmospheric pressure (0.8 atm). Over virtually all equivalence ratios examined, a previously integrated chemical mechanism underpredicted the ...
Orval Powell, Chris Dreyer, Paul Papas
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Laminar Flame Speed Characterization of Synthetic Gasoline Components
SAE Technical Paper Series, 2014<div class="section abstract"><div class="htmlview paragraph">This paper investigated the laminar flame speed behavior of a matrix of ten spark-ignition fuels and fuel components using a spherical combustion bomb. The analysis methodology relied solely on the in-bomb pressure data. For each fuel measurements were performed at five different
Toby Rockstroh +3 more
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Laminar Flame Speed of Lean Premixed H2/CO/Air Flames
2017This chapter provides an in-depth study on the laminar flame speed of lean premixed H2/CO/air flames. The experimentation covered a broad range of the H2/(H2 + CO) volumetric ratio. The performance of chemical kinetic mechanisms was verified using the new data. The flame temperature and the chemical kinetics was studied and a semi-empirical correlation
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As global energy demands rise and concerns over fossil fuel emissions intensify, there is an urgent need to develop sustainable alternatives. Extensive research is being conducted to optimize hydrogen combustion. Key combustion properties, such as laminar flame speed and Markstein number, play crucial roles in characterizing premixed flames.
Borde, Ganesh, 0009-0004-3876-9074
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Borde, Ganesh, 0009-0004-3876-9074
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Influence of laminar flame speed on turbulent premixed combustion
Combustion and Flame, 1986Abstract A laminar flamelet model utilized with the Bray-Moss-Libby model to analyze premixed turbulent combustion is revised to include effects of pressure change across flamelets as well as those of chemical production and molecular transports.
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