Development of a Zero-Dimensional Heat Release Model for
Application to Small Bore Diesel Engines

Schihl, Peter; Tasdemir, John; Schwarz, Ernest; Bryzik, Walter

doi:10.4271/2002-01-0073

Cited by 12 publications

(13 citation statements)

References 30 publications

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“…The smaller bore engine was a single cylinder automotive-type (Schihl et al, 2002) while the larger bore engine was a two cylinder engine variant of the Bradley Fighting Vehicle V-8 power plant (Schihl et al, 2001). Each engine was operated over a variety of speed and load conditions, and included piezoelectric transducers for measuring combustion chamber pressure for heat release analysis.…”

Section: Methodsmentioning

confidence: 99%

“…and the injection event (fuel velocity, number of nozzle holes and size, and angle) qualifiers on the heat release event through judicious selection of three constants -spray angle, laminar flame speed, and viscous dissipation (Schihl et al, 1999(Schihl et al, , 2002. The first constant is the most difficult to assess and usually is chosen based on measurements acquired by various researchers in engines and in combustion bombs; the second constant is actually a physicochemical property of the fuel; the last constant represents the turbulent dissipation rate and tends to be on the order of a tenth based on a number of engines modeled in the past.…”

Section: Report Documentation Pagementioning

confidence: 99%

“…The underlying assumption of this method is that the spray mixing layer fuel consumption rate can be determined if the turbulent intensity is known and the flame sheet is thin in comparison to the mean eddy length scale (Turns, 1996). Based on experience with various engines it should be possible to properly scale turbulence intensity given the good agreement between LSCM predictions and heat release data over various engine speed-load conditions (Schihl et al, 1999, Schihl et al, 2002. Additionally, utilization of a large database of engine operating conditions will also minimize any experimental and modeling errors associated with indirect determination of the associated heat release profiles.…”

Section: Report Documentation Pagementioning

confidence: 99%

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Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

Schihl¹,

Tasdemir²,

Bryzik³

2006

Transformational Science and Technology for the Current and Future Force

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One of the key challenges facing diesel engine system modelers lies in adequately predicting the fuel burning rate profile given the direct relationship between energy release and key performance parameters such as fuel economy, torque, and exhaust emissions. Current state-of-the-art combustion sub-models employed in such system simulation codes rely heavily on empiricism and successful application of such sub-models for new engine designs is highly dependent on past experience with similar combustion systems. One common approach to address this issue is to expend great effort choosing associated empirical coefficients over a range of similar combustion system designs thus improving the potential predictive capability of a given empirical model. But, continual combustion system development and design changes limit the extrapolation and application of such generic combustion system dependent coefficients to new designs due to various reasons including advancements in fuel injection systems, engine control strategy encompassing multiple injections, and combustion chamber geometry.In order to address these very difficult challenges, an extensive effort has been applied toward developing a physically based, simplified combustion model for military-relevant diesel engines known as the Large Scale Combustion Model (LSCM). Recent effort has been spent further refining the first stage of the LSCM two stage combustion model that is known as the premixed phase sub-model. This particular sub-model has been compared with high-speed cylinder pressure data acquired from two relevant direct injection diesel engines with much success based on a user defined parameter referred to as the laminar flame speed by the combustion community. It is a physically significant parameter that is highly dependent on local temperature, pressure, and oxygen concentration but little experimental effort has been spent determining its behavior for diesel fuel due to ignition constraints. This submission will discuss one approach of indirectly determining this key combustion parameter.

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Section: Methodsmentioning

confidence: 99%

Section: Report Documentation Pagementioning

confidence: 99%

Section: Report Documentation Pagementioning

confidence: 99%

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Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

Schihl¹,

Tasdemir²,

Bryzik³

2006

Transformational Science and Technology for the Current and Future Force

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“…Unfortunately, with the generalization of the pilot injection, the pre-mixed combustion mode can no longer be neglected. Several models are now available for the description of this combustion mode [17,18]. Chmela et al [17] introduced its modelling in their previous model, increasing its predictability.…”

Section: F-a Lafossas Et Al / Development Of a Coupling Approach Betmentioning

confidence: 99%

“…In this burning mode, the combustion is piloted by the mixture speed between the injected fuel and the surrounding air. Generally, the mass of fuel burnt in this mode is defined with a simple equation [1,[16][17][18][19]: (6) where m f,mix is the available mass of fuel in the mixing controlled zone. f(k) is a function of the turbulent kinetic energy in the combustion chamber, if the mixture between the injected fuel and the fresh air is supposed to be mixed by the turbulent kinetic energy k. According to the work of Chmela et al [16] and Jaine [11], the turbulent kinetic energy k in a DI Diesel engine is mainly created by the kinetic energy introduced by the spray.…”

Section: Mixing Controled Combustion For the Main Injectionmentioning

confidence: 99%

Development of a Coupling Approach between 0D D.I. Diesel Combustion and Pollutant Models: Application to a Transient Engine Evolution

Lafossas

Marbaix

Ménégazzi

2008

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Modélisation 0D des émissions polluantes Diesel : développement et utilisation d'une méthodologie de couplage entre un modèle de combustion Diesel 0D et un modèle de polluantsAfin de satisfaire les normes de pollution de plus en plus sévères, les constructeurs automobiles ont généralisé l'utilisation du contrôle électronique du moteur. Ce contrôle permet de s'assurer en permanence du fonctionnement optimum du moteur en adéquation avec la demande de couple du conducteur et le bon fonctionnement des organes de post-traitement. Le développement et la calibration des algorithmes de contrôle moteur ne peuvent se faire qu'avec une compréhension fine du comportement dynamique du groupe motopropulseur, couplé à sa ligne d'échappement. Jusqu'à présent, un grand nombre d'essais sur banc moteur et sur véhicule était nécessaire pour atteindre des niveaux de calibration suffisants pour le contrôleur. Afin de diminuer les coûts de production, il devient de plus en plus important de limiter ces essais expérimentaux en ayant recours à la simulation. Dans ce contexte, il est important de disposer de modèles de combustion et de polluants prédictifs, calibrés sur un nombre limité de points expérimentaux et utilisables sur une grande plage de points de fonctionnement moteur. Ce papier présente un modèle 0D de combustion Diesel, basé sur le modèle de Barba [Barba C. et al. (2000) DI Diesel Engines with Common Rail Injection, SAE Technical Paper 2000-01-2933, permettant en particulier de prendre en compte l'impact de la multi-injection sur le déroulement de la combustion. Le modèle répartit chaque injection en deux zones : une première pour la flamme de pré-mélange lors du début de la combustion et une autre pour la flamme de diffusion. Afin de simuler la production de polluants, un modèle de mélange indexé sur l'énergie cinétique turbulente générée par le spray a été introduit. Ce dernier modèle permet de créer une zone de gaz brûlés dans la chambre de combustion dans laquelle les émissions de CO, NO x et suies sont calculées. Les modèles de polluants sont d'abord validés en utilisant le logiciel CHEMKIN et des résultats de calculs 3D. Des résultats expérimentaux obtenus sur un moteur 4 cylindres Diesel à injection directe en fonctionnement stabilisé sont ensuite utilisés pour valider et calibrer le couplage entre le modèle de combustion et les modèles de polluants. Le simulateur ainsi calibré est enfin utilisé pour simuler un fonctionnement en transitoire de charge du moteur. -A Phenomenological Combustion Model for Heat Release Rate Prediction in High Speed Abstract

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Development of a zero-dimensional Diesel combustion model. Part 1: Analysis of the quasi-steady diffusion combustion phase

Arrégle

López

García

et al. 2003

Applied Thermal Engineering

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Development of a Zero-Dimensional Heat Release Model for Application to Small Bore Diesel Engines

Cited by 12 publications

References 30 publications

Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

Determination of Laminar Flame Speed of Diesel Fuel for Use in a Turbulent Flame Spread Premixed Combustion Model

Development of a Coupling Approach between 0D D.I. Diesel Combustion and Pollutant Models: Application to a Transient Engine Evolution

Development of a zero-dimensional Diesel combustion model. Part 1: Analysis of the quasi-steady diffusion combustion phase

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