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Combustion Modeling of Diesel Combustion with Partially Premixed Conditions
SAE Technical Paper Series, 2007<div class="htmlview paragraph">Two turbulent combustion modeling approaches, which were large eddy simulations in conjunction with detailed kinetics (LES-CHEMKIN) and Reynolds Averaged Navier Stokes with detailed kinetics (RANS-CHEMKIN), were used to model two partially premixed engine conditions.
Bing Hu +4 more
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LES of Partially Premixed Combustion
2002Numerical studies devoted to partially premixed combustion are first reviewed. Then a Large Eddy Simulation procedure is proposed for these flames when they develop in turbulent flows. The corresponding subgrid combustion modeling is tested for the case of a turbulent lifted-flame.
Luc Vervisch, Pascale Domingo
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Emissions and Soot in Partially Premixed Combustion
2014Practical combustion systems typically undergo non-premixed mode of combustion, in which the fuel is injected directly into the combustion chamber, which already has compressed air. The emissions tend to be high in this diffusion mode of combustion as compared to premixing mode.
Surbhi Kohli, Abhijit Kushari
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Combustion Modeling of Partially Premixed Flames
Volume 2: Combustion, Fuels and Emissions, Parts A and B, 2010Accurate and properly validated turbulence-chemistry interaction models for RANS combustion computational fluid dynamics (CCFD) simulations are required in support of the development process of modern gas turbine combustors. Although standard models are available for fully premixed and purely non premixed turbulent combustion, models describing ...
Ilona Zimmermann, Michael Pfitzner
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Turbulent flame propagation in partially premixed combustion
Symposium (International) on Combustion, 1998Stratified spark-ignition engines that use direct fuel injection into the combustion chamber feature both small- and large-scale spatial variations in unburned mixture composition. In these configurations, the spark-ignited turbulent flame propagates into a mixture with variable equivalence ratio.
J. Hélie, A. Trouvé
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Optimization of Gasoline Partially Premixed Combustion Mode
SAE Technical Paper Series, 2013<div class="section abstract"><div class="htmlview paragraph">Recent works have demonstrated the possibility of operating compression ignition engine with high resistance to auto-ignition fuels as gasoline. By using gasoline and dilution by exhaust gas recirculation, compression ignition can reach high efficiencies and low particulate (PM ...
Mounaïm-Rousselle, Christine +2 more
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Experimental Aspects of Partially Premixed Pulsating Combustion
3rd International Energy Conversion Engineering Conference, 2005The pulsating combustion process has won interest in current research due to indications that its application in energy generation can offer several advantages, such as: fuel economy, reduced pollutants formation, increased rate of convective heat transfer and reduced investment, when compared with conventional techniques.
Daniel Ferreira +3 more
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Modeling partially premixed turbulent combustion
2001This paper investigates the process of partially premixed turbulent combustion in situations where the fuel is provided either as a liquid spray or a purely gaseous stream. In the former case, two-dimensional direct numerical simulations in association with a Lagrangian solver for the dispersed vaporizing phase are employed.
M. Herrmann +6 more
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Effects of Different Injection Strategies and EGR on Partially Premixed Combustion
SAE Technical Paper Series, 2018<div class="section abstract"><div class="htmlview paragraph">Premixed Charge Compression Ignition concepts are promising to reduce NOx and soot simultaneously and keeping a high thermal efficiency. Partially premixed combustion is a single fuel variant of this new combustion concepts applying a fuel with a low cetane number to achieve the ...
Han, J., Wang, S., Somers, L.M.T.
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Partially premixed diffusion flamelets in non-premixed turbulent combustion
Symposium (International) on Combustion, 1985The structure and extinction of partially premixed diffusion flamelets in a turbulent flow field is analyzed. It is shown that diffusion flamelets are disconnected if the variation of the mixture fraction around stoichiometric is large enough for the corresponding adiabatic flame temperature to be less than a characteristic freezing temperature. At the
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