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

Arrégle, Jean; López, J. Javier; García, José Manuel Sánchez; Fenollosa, Carlos

doi:10.1016/s1359-4311(03)00079-6

Cited by 86 publications

(44 citation statements)

References 19 publications

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“…For this research in particular, since the injection velocity and fuel properties were kept constant along the tests, it is possible to redefine the mixing capacity [36] and re-write the expression derived from equation (1) as follow:…”

Section: Combustion Processmentioning

confidence: 99%

Analysis of the combustion process, pollutant emissions and efficiency of an innovative 2-stroke HSDI engine designed for automotive applications

Benajes

Lima

Tribotté

et al. 2013

Applied Thermal Engineering

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ElsevierBenajes Calvo, JV.; Novella Rosa, R.; De Lima Moradell, DA.; Tribotte, P.; Quechon, N.; Obernesser, P.; Dugue, V. (2013). Analysis of the combustion process, pollutant emissions and efficiency of an innovative 2-stroke HSDI engine designed for automotive applications. Applied Thermal Engineering. 58(1-2): 181-193. doi:10.1016/j.applthermaleng.2013 AbstractOn the last years engine researchers has been focused on improving engine efficiency in order to decrease CO 2 emissions and fuel consumption, while fulfilling the increasingly stringent pollutant emissions regulations. In this framework, engine downsizing arises as a promising solution, and 2-stroke cycle operation offers the possibility of reducing the number of cylinders without incurring in NVH penalties. An experimental investigation has been performed to evaluate the performance of a newly-designed poppet valves 2-stroke engine, in terms of finding the proper incylinder conditions to fulfill the emission limits in terms of NO X and soot, keeping competitive fuel consumption levels. Moreover, present research work aims to improve the existing knowledge about the gas exchange processes in a 2-stroke engine with poppet valves architecture, and its impact over the combustion conditions, final exhaust emissions levels and engine efficiency. The experimental results confirm how this engine architecture presents high flexibility in terms of air management control to substantially affect the in-cylinder conditions. The in-cylinder oxygen concentration and density, which are the product of a given trapping ratio and delivered mass flow, were linked to pollutant emissions and performance by their impact on instantaneous adiabatic flame temperature and spray mixing conditions. After the optimization process, it was possible to minimize simultaneously NO X , soot and indicated fuel consumption, without observing a critical trade-off between the pollutant emissions and the fuel consumption.

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Section: Combustion Processmentioning

confidence: 99%

Analysis of the combustion process, pollutant emissions and efficiency of an innovative 2-stroke HSDI engine designed for automotive applications

Benajes

Lima

Tribotté

et al. 2013

Applied Thermal Engineering

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“…The data collected from the single cylinder engine were used as input for an in-house 1-D spray model, DICOM [16] [17]. The main objective when applying the code is to clarify the mixing process in response to variations of the in-cylinder fuel blending ratio and injection timings.…”

Section: D Computational Modellingmentioning

confidence: 99%

Effect of laser induced plasma ignition timing and location on Diesel spray combustion

Pastor

García-Oliver

García

et al. 2017

Energy Conversion and Management

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ElsevierBenajes Calvo, JV.; Molina Alcaide, SA.; García Martínez, A.; Belarte Mañes, E.; Vanvolsem, M. (2014). An investigation on RCCI combustion in a heavy duty diesel engine using in-cylinder blending of diesel and gasoline fuels. Applied Thermal Engineering. 63 (1) AbstractAn experimental and numerical study has been carried out to understand mixing and auto-ignition processes in RCCI combustion conditions, using gasoline and diesel as low and high reactivity fuels, respectively. Three parametrical studies have been developed using a heavy duty compression ignition engine equipped with a direct injector and a port fuel injector, to be able to vary the in-cylinder fuel blending ratio. Besides, a detailed analysis in terms of air/fuel mixing process has also been performed by means of a 1-D spray model. It is found that combustion starts with the auto-ignition of the diesel injection and the air and gasoline entrained. Then, the temperature and pressure raise starts the flame propagation across the lean diesel and gasoline zones of the combustion chamber. As the Diesel/Gasoline fuel ratio is reduced, the ignition delay increases extending the mixing time and the first combustion stage gets lowered while the second one is enhanced. The advance of the diesel injection timing enlarges the mentioned effects over the combustion process. With respect to conventional neat diesel combustion, a slight reduction in terms of NOx and a very important reduction in terms of soot were achieved with the RCCI combustion.

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“…The characteristic mixing time required for a fuel packet injected in a steady state to reach the stoichiometric surface is given in the following the expressions 18 :…”

mentioning

confidence: 99%

“…In reactive condition, the high local temperature in that zone has a negative effect on mixing process. 18,19,20 density of the mixture fuel/gas in inert conditions and ρcomb the local density of the mixture in reactive conditions. Considering a constant pressure in the combustion chamber this correction factor can be also approximated as the square root of the ratio between Tflame and the unburned gas temperature (Tub) as it was also found by other authors.…”

mentioning

confidence: 99%

The role of in-cylinder gas density and oxygen concentration on late spray mixing and soot oxidation processes

Benajes¹,

Novella²,

García³

et al. 2011

Energy

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ElsevierBenajes Calvo, JV.; Novella Rosa, R.; García Martínez, A.; Arthozoul ., SJL. (2011). The role of in-cylinder gas density and oxygen concentration on late spray mixing and soot oxidation processes. Energy. 36:1599Energy. 36: -1611Energy. 36: . doi:10.1016Energy. 36: /j.energy.2010.071. 1The Role of In-Cylinder Gas Density and Oxygen Parametrical tests were performed on a single cylinder heavy-duty research engine. The density was modified adjusting the boost pressure following two approaches, maintaining the YO2 either before or after the combustion process. The YO2 was modified by diluting fresh air with exhaust gas maintaining a constant density. The possibility of controlling the soot emissions combining both parameters (YO2 and density) is evaluated and, in a final part, the NOX emission results are also addressed.Results show that YO2 has a strong effect on both mixing and oxidation processes while density affects principally the mixing process. Both parameters affect the final soot emissions. The density modification through adjustment of boost pressure modifies the trapped mass and has a strong impact on the evolution of YO2 (thus on the evolution of the mixing process) during combustion. If the density is increased maintaining constant the YO2 at the beginning of the combustion, the NOX-Soot trade-off is enhanced.

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

Cited by 86 publications

References 19 publications

Analysis of the combustion process, pollutant emissions and efficiency of an innovative 2-stroke HSDI engine designed for automotive applications

Analysis of the combustion process, pollutant emissions and efficiency of an innovative 2-stroke HSDI engine designed for automotive applications

Effect of laser induced plasma ignition timing and location on Diesel spray combustion

The role of in-cylinder gas density and oxygen concentration on late spray mixing and soot oxidation processes

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