Results 141 to 150 of about 566 (187)
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Gasoline partially premixed combustion, the future of internal combustion engines?
International Journal of Engine Research, 2011Gasoline partially premixed combustion showed the potential of very high efficiency, emissions of nitrogen oxides (NO x) and soot below future emission regulations, and acceptable acoustic noise from idle up to 26 bar gross indicated mean effective pressure.
V Manente, B Johansson, W Cannella
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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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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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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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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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Partially Premixed Combustion in Lifted Turbulent Jets
Combustion Science and Technology, 2000This article reports observations of structures consistent with triple flame reaction zones in the stabilization region of turbulent nonpremixed jet flames. Previous studies of laminar mixing layers and nonpremixed jets show Hi brachial structures, however reports of triple flame structures in turbulent flowfields are sparse, The asymmetric coflow ...
K.M. LYONS, K.A. WATSON
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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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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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