Development of a New Multi-Zone Model for the Description of Physical Processes in HCCI Engines

Komninos, N.P.; Hountalas, D. T.; Kouremenos, D. A.

doi:10.4271/2004-01-0562

Cited by 42 publications

(31 citation statements)

References 10 publications

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“…The first kind of strategy only considers the interaction due to work exchange [8][9][10], while the second kind takes into account both work and mass exchanges [11][12][13] between zones. The third kind of models accounts for the exchanges of work, mass and heat between zones [14][15][16][17]. It has been shown that the sole inclusion of work exchange in the model might cause significant error in the predictions of CO, unburned hydrocarbon and even pressure.…”

Section: Assumptionsmentioning

confidence: 99%

“…where is the Stefan Boltzmann constant, and k p is the Planck mean absorption coefficient that is calculated by the method recommended by Tien [22], considering the radiating species: CO 2 , H 2 O and CO. Heat exchange between a zone and its neighboring zones due to conduction is calculated by a method suggested by Komninos et al [14]. Heat is conducted to zone k from zones k+ 1 and k-1.…”

Section: Heat Transfer Modelmentioning

confidence: 99%

“…The multi-zone model developed by Komninos et al [14,15] accounted for both heat and mass exchange between zones. Similar strategies were employed by Kongsereeparp et al [16] and Kongsereeparp and Checkel [17] in their multi-zone model.…”

Section: Introductionmentioning

confidence: 99%

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A Study on the Performance of Combustion in a HCCI Engine Using n-Heptane by a Multi-Zone Model

Guo

Neill

2009

ASME 2009 Internal Combustion Engine Division Fall Technical Conference

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A study of n-heptane combustion in an HCCI engine was carried out by a multi-zone numerical simulation that covers a complete engine cycle. A reaction mechanism that includes 177 chemical species and 1638 reactions was used. The results of the numerical simulations were compared to existing experimental data for a range of air/fuel ratios, compression ratios and engine speeds.It is shown that the numerical simulation is able to reasonably capture the experimental cylinder pressure data over a wide range of operation conditions. It also provides a qualitative trend of CO emissions. The numerical simulation overpredicted the combustion at some operating conditions, such as at extremely high air/fuel ratios and higher engine speeds.Some differences were observed between the experimental and numerical data for NO X emissions. The numerical simulation predicted a monotonic decrease in NO X emissions as air/fuel ratio increased or compression ratio decreased, while an increase in NO X emissions was observed experimentally when combustion became very weak at extremely high air/fuel ratios or low compression ratios. It is suggested that further experiments and numerical simulations should be performed to explain this discrepancy.

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Section: Assumptionsmentioning

confidence: 99%

Section: Heat Transfer Modelmentioning

confidence: 99%

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A Study on the Performance of Combustion in a HCCI Engine Using n-Heptane by a Multi-Zone Model

Guo

Neill

2009

ASME 2009 Internal Combustion Engine Division Fall Technical Conference

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“…To this extent, theoretical models play a very important role, together with experimental investigation. Several detailed models have been developed to capture the combustion process and kinetics [7], [8]. These include multi-zone models and multi-dimensional CFD models using detailed chemistry.…”

Section: Introductionmentioning

confidence: 99%

A control - oriented model of combustion process in a HCCI diesel engine

Canova

Garcin

Midlam-Mohler

et al.

Proceedings of the 2005, American Control Conference, 2005.

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Homogeneous Charge Compression Ignition is a promising concept for achieving low emissions at partload operations. This technique can be successfully applied to traditional Direct Injection Diesel engines with low extra costs and no modification to the DI system by performing the mixture formation in the intake manifold.The present work describes the development of a controloriented model for the study of the combustion process in a HCCI Diesel engine with external mixture formation. The model is based on a first-law thermodynamic analysis of in-cylinder processes in order to identify the influence of the main control parameters on HCCI auto-ignition. The combustion process is modeled through the definition of a gross heat release rate, avoiding a detailed description of the chemical reactions that could increase the complexity and the computation time.The model is then validated against experimental data obtained on a Diesel engine equipped with an external fuel atomizer. The satisfactory agreement obtained and the low calibration effort make the model a useful tool for the development of applications related to HCCI engine control and diagnostics.

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“…Generally, engine mathematical model can be classified into two main groups: thermodynamic and multi-dimensional models. Thermodynamic models assume energy equation as the main conservation equation and are subdivided into single and multi-zone models [15,16]. In this kind of models, physical processes such as turbulent flow effects are not directly modeled, some correlations with numerous constants are used instead.…”

Section: Introductionmentioning

confidence: 99%

3-Dimensional Numerical Modeling on the Combustion and Emission Characteristics of Biodiesel in Diesel Engines

Yang

Amin

et al. 2014

Int. J. Mod. Phys. Conf. Ser.

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A 3-dimensional computational fluid dynamics modeling is conducted on a direct injection diesel engine fueled by biodiesel using multi-dimensional software KIVA4 coupled with CHEMKIN. To accurately predict the oxidation of saturated and unsaturated agents of the biodiesel fuel, a multicomponent advanced combustion model consisting of 69 species and 204 reactions combined with detailed oxidation pathways of methyl decenoate (C11H22O2), methyl-9-decenoate (C11H20O2) and n-heptane (C7H16) is employed in this work. In order to better represent the real fuel properties, the detailed chemical and thermo-physical properties of biodiesel such as vapor pressure, latent heat of vaporization, liquid viscosity and surface tension were calculated and compiled into the KIVA4 fuel library. The nitrogen monoxide (NO) and carbon monoxide (CO) formation mechanisms were also embedded. After validating the numerical simulation model by comparing the in-cylinder pressure and heat release rate curves with experimental results, further studies have been carried out to investigate the effect of combustion chamber design on flow field, subsequently on the combustion process and performance of diesel engine fueled by biodiesel. Research has also been done to investigate the impact of fuel injector location on the performance and emissions formation of diesel engine. Int. J. Mod. Phys. Conf. Ser. 2014.34. Downloaded from www.worldscientific.com by 116.109.118.29 on 06/21/16. For personal use only.

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Development of a New Multi-Zone Model for the Description of Physical Processes in HCCI Engines

Cited by 42 publications

References 10 publications

A Study on the Performance of Combustion in a HCCI Engine Using n-Heptane by a Multi-Zone Model

A Study on the Performance of Combustion in a HCCI Engine Using n-Heptane by a Multi-Zone Model

A control - oriented model of combustion process in a HCCI diesel engine

3-Dimensional Numerical Modeling on the Combustion and Emission Characteristics of Biodiesel in Diesel Engines

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