Formulation of a One-Component Fuel Lumping Model to Assess the Effects of Fuel Thermodynamic Properties on Internal Combustion Engine Mixture Preparation and Combustion

Habchi, C.; Lafossas, F.-A.; Béard, P.

doi:10.4271/2004-01-1996

Cited by 17 publications

(14 citation statements)

References 18 publications

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“…The standard Droplet Discrete Model available in StarCD was used to calculate the diesel spray features. Spray atomization and break-up where simulated by means of the Huh-Gosman [56] and Reitz-Diwakar [57] models, whereas diesel fuel physical properties were given by the DF1 fuel surrogate [58].…”

Section: Numerical Model Descriptionmentioning

confidence: 99%

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Tormos

Novella

Gómez-Soriano

et al. 2019

Tribology International

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The engine oil contamination by both particulate matter (PM) and fuel is becoming an important problem since strategies to control pollutant emissions in internal combustion engines (ICE) significantly increase their presence in engine oil. As a consequence, the engine oil loses its tribological properties compromising engine lubrication and leading to potential problems in engine such as wear, corrosion, etc. For that reason, the study of the oil degradation and contamination due to these strategies have a special interest to the engine manufacturers and engine oil formulators. In this paper, the engine oil soot content and fuel dilution is analysed under real engine conditions. The study is addressed from two different but complementary points of views. First, on-line measurements at several engine operating conditions are performed in order to further understand how the soot generation correlates with the oil soot content and other derived problems on oil performance. Then, experimental data available after the experimental campaign is used to calibrate a numerical model, based on Computational Fluid Dynamics (CFD), that estimate the amount of soot particles settled in the engine oil. Results show that soot particles are more present in oil when operating high load-speed conditions and during the Diesel Particulate Filter (DPF) regeneration cycles. Regarding the fuel dilution, delayed post-injections are critical since they significantly increase the amount of fuel in the engine oil. Numerical results also show the relationships between the soot particles generated during combustion and the amount of soot in engine oil, giving an enhanced comprehension of soot-in-oil deposition mechanisms.

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Section: Numerical Model Descriptionmentioning

confidence: 99%

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Tormos

Novella

Gómez-Soriano

et al. 2019

Tribology International

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“…Reminding that our purpose is to demonstrate FPI approach feasibility on a complete engine calculation, the surrogate fuel is supposed to have the same chemical global formulation as C 7 H 16 including its thermodynamics properties. In contrast, liquid properties entering the evaporation rate calculation of the spray droplets, are treated as a single component lumped fuel as proposed in [32] or [33]. Two injector positions are simulated: Case-1 operating point corresponds to a restricted nozzle tip protrusion whereas Case-2 injector position is 1.1mm below in the combustion chamber.…”

Section: Engine Applicationsmentioning

confidence: 99%

Development of a FPI Detailed Chemistry Tabulation Methodology for Internal Combustion Engines

Pera

Colin

Jay

2009

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Développement d'une tabulation FPI pour la prise en compte de la chimie complexe dans la simulation 3D moteurs -L'objectif de cette étude est d'utiliser une tabulation de la chimie de type FPI (Flame Prolongation of ILDM) pour la simulation 3D de la combustion dans les moteurs. La première difficulté a été d'adapter la méthode à des codes compressibles tout en se limitant à des tailles de tables raisonnables. Pour satisfaire ces contraintes, une nouvelle formulation a été proposée. Elle permet de garder une structure de code basée sur le transport de quelques espèces chimiques tout en assurant la cohérence de l'évolution du système grâce à une équation pour l'avancement de la réaction. Le terme source chimique impliqué dans cette dernière est directement extrait de la tabulation. L'approche retenue permet également d'appliquer la modélisation FPI à des problématiques moteur comme l'utilisation de carburants complexes caractérisés par des chimies détaillées très lourdes ou la combustion fortement diluée. Le modèle proposé, introduit dans le code de simulation moteur IFP-C3D, a été validé sur des configurations homogènes à volume constant et à volume variable contrôlé. Enfin, le modèle complet a été appliqué avec succès à un cas moteur Diesel à injection directe. Abstract -Development of a FPI Detailed Chemistry Tabulation Methodology for Internal Combustion Engines -In this paper, the FPI (Flame Prolongation of ILDM) approach for chemistry tabulation is applied to 3D internal combustion engine simulations. The first issue is to

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“…HuhGosman [29] and Reitz-Diwakar [30] models are applied for primary and secondary break-up. Fuel physical properties are given by the so-called DF1 [31] diesel fuel surrogate.…”

Section: Paper Draft: Evaluation Of Massive Egr and Miller Cycle Stramentioning

confidence: 99%

Evaluation of massive exhaust gas recirculation and Miller cycle strategies for mixing-controlled low temperature combustion in a heavy duty diesel engine

Benajes

Molina

Novella

et al. 2014

Energy

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ElsevierMolina Alcaide, SA.; Benajes Calvo, JV.; Novella Rosa, R.; Belarte Mañes, E. (2014). Evaluation of massive exhaust gas recirculation and Miller cycle strategies for mixingcontrolled low temperature combustion in a heavy duty diesel engine. Energy. (71) AbstractThe future of compression ignition engines depends on their ability for keeping their competitiveness in terms of fuel consumption compared to spark-ignition engines. In this competitive framework, the Low Temperature Combustion (LTC) concept is a promising alternative to decrease NOx and soot emissions. Thus, this research focuses on implementing the LTC concept, but keeping the conventional mixing-controlled combustion process to overcome the well-known drawbacks of the highly-premixed combustion concepts, including load limitations and lack of combustion control. Two strategies for implementing the mixing-controlled LTC concept were evaluated. The first strategy relies on decreasing the intake oxygen concentration introducing high rates of cooled EGR. The second strategy consists of decreasing the compression temperature by advancing the intake valves closing angle to reduce the effective compression ratio, compensating the air mass losses by increasing boost pressure (Miller cycle). These strategies were tested in a singlecylinder heavy-duty research engine. Additionally, 3D-CFD modeling was used to give insight into local in-cylinder conditions during the injection-combustion process. Results confirm the suitability of both strategies for reducing NOx and soot emissions, while their main drawback is the increment in fuel consumption. However, they present intrinsic differences in terms of local equivalence ratios and temperatures along combustion.

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Formulation of a One-Component Fuel Lumping Model to Assess the Effects of Fuel Thermodynamic Properties on Internal Combustion Engine Mixture Preparation and Combustion

Cited by 17 publications

References 18 publications

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Study of the influence of emission control strategies on the soot content and fuel dilution in engine oil

Development of a FPI Detailed Chemistry Tabulation Methodology for Internal Combustion Engines

Evaluation of massive exhaust gas recirculation and Miller cycle strategies for mixing-controlled low temperature combustion in a heavy duty diesel engine

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