An Interactively Coupled CFD-Multi-Zone Approach to Model HCCI Combustion

Felsch, C.; Dahms, Rainer N.; Glodde, B.; Vogel, Steven; Jerzembeck, Sven; Peters, N.; Barths, H.; Sloane, Thompson M.; Wermuth, Nicole; Lippert, Andreas

doi:10.1007/s10494-009-9202-6

Cited by 14 publications

(13 citation statements)

References 44 publications

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“…In Felsch et al [14], the overall simulation results for the stand-alone multi-zone model in terms of pressure curves, IMEP HP , CA10, CA50, CO emissions, combustion efficiency, and NO/NO x emissions were not as accurate in predicting the experimental results as the ones presented in the current work, where the evolution of r MB was qualitatively adjusted to the one from the three-dimensional approach.…”

Section: Mixing Modelcontrasting

confidence: 56%

“…The SOI variation shown in Figures 3, 4, 5, and 6 was also investigated in a previous work by Felsch et al [14], with just one constant value of 100.0 being chosen for r MB , which is of the same order of magnitude as 169.7. In Felsch et al [14], the overall simulation results for the stand-alone multi-zone model in terms of pressure curves, IMEP HP , CA10, CA50, CO emissions, combustion efficiency, and NO/NO x emissions were not as accurate in predicting the experimental results as the ones presented in the current work, where the evolution of r MB was qualitatively adjusted to the one from the three-dimensional approach.…”

Section: Mixing Modelmentioning

confidence: 94%

“…Issues within the two-way-coupling included maintaining thermodynamic consistency between the two representations and interactions among zones. Following from there, an interactively coupled CFD-multi-zone approach was presented in Felsch et al [12] that can be used to simulate HCCI combustion. Later, Felsch et al [13] applied this interactively coupled CFD-multi-zone approach for various PCCI operating conditions in a 1.9l FIAT GM Diesel engine.…”

Section: Multi-zone Model Derivation From a Detailed Cfd Modelmentioning

confidence: 99%

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A Dynamic Simulation Strategy for PCCI Combustion Control Design

Peters

Hoffmann

Felsch

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Méthode de développement de lois de commande pour la combustion PCCI basée sur la simulation système -Cet article présente une méthodologie de développement de lois de commande pour la combustion PCCI. La méthode proposée repose sur l'utilisation d'un simulateur du moteur dont le niveau de représentation est adapté aux besoins de l'application ciblée. Le simulateur proposé repose sur l'association d'un modèle de combustion multidimensionnel (pour la partie haute pression du cycle moteur) et d'un modèle à valeurs moyennes (pour la description des d'échanges gazeux). L'association des caractéristiques de ces modèles permet d'aboutir à un niveau de représen-tation suffisamment précis pour accompagner le développement de lois de commande. De plus, les simplifications réalisées permettent des gains conséquents en termes de temps de simulation. Cet article propose aussi une simplification supplémentaire en introduisant une méthode d'identification d'un modèle de Wiener. Les résultats présentés dans cette publication sont le fruit des travaux du centre de recherche « SFB 686 -Modellbasierte Regelung der homogenisierten Niedertemperatur-Verbrennung » de l'Université RWTH d'Aix-la-Chapelle et de l'Université de Bielefeld en Allemagne. Abstract -A Dynamic Simulation Strategy for PCCI Combustion Control Design -Subject of this work is a dynamic simulation strategy for PCCI combustion that can be used in closed-loop control development. A detailed multi-zone chemistry model for the high-pressure part of the engine cycle is

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Section: Mixing Modelcontrasting

confidence: 56%

Section: Mixing Modelmentioning

confidence: 94%

Section: Multi-zone Model Derivation From a Detailed Cfd Modelmentioning

confidence: 99%

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A Dynamic Simulation Strategy for PCCI Combustion Control Design

Peters

Hoffmann

Felsch

et al. 2011

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…As such, they partly determine, for example, atomization and breakup processes of two-phase flows [1,2] or the chemistry and adhesion of thin films over surfaces [3,4]. The significance of such processes for many modern power and propulsion systems such as diesel engines [5][6][7][8][9][10][11], spark-ignition engines [12][13][14][15][16][17][18][19][20][21][22], or gas turbines [23][24][25][26][27][28] is widely established and well recognized. Nucleation describes the formation of a new thermodynamic phase or structure when the free energy barrier is overcome.…”

Section: Introductionmentioning

confidence: 99%

Gradient Theory simulations of pure fluid interfaces using a generalized expression for influence parameters and a Helmholtz energy equation of state for fundamentally consistent two-phase calculations

Dahms

2015

Journal of Colloid and Interface Science

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The fidelity of Gradient Theory simulations depends on the accuracy of saturation properties and influence parameters, and require equations of state (EoS) which exhibit a fundamentally consistent behavior in the two-phase regime. Widely applied multi-parameter EoS, however, are generally invalid inside this region. Hence, they may not be fully suitable for application in concert with Gradient Theory despite their ability to accurately predict saturation properties. The commonly assumed temperature-dependence of pure component influence parameters usually restricts their validity to subcritical temperature regimes. This may distort predictions for general multi-component interfaces where temperatures often exceed the critical temperature of vapor phase components. Then, the calculation of influence parameters is not well defined. In this paper, one of the first studies is presented in which Gradient Theory is combined with a next-generation Helmholtz energy EoS which facilitates fundamentally consistent calculations over the entire two-phase regime. Illustrated on pentafluoroethane as an example, reference simulations using this method are performed. They demonstrate the significance of such high-accuracy and fundamentally consistent calculations for the computation of interfacial properties. These reference simulations are compared to corresponding results from cubic PR EoS, widely-applied in combination with Gradient Theory, and mBWR EoS. The analysis reveals that neither of those two methods succeeds to consistently capture the qualitative distribution of obtained key thermodynamic properties in Gradient Theory. Furthermore, a generalized expression of the pure component influence parameter is presented. This development is informed by its fundamental definition based on the direct correlation function of the homogeneous fluid and by presented high-fidelity simulations of interfacial density profiles. The new model preserves the accuracy of previous temperature-dependent expressions, remains well-defined at supercritical temperatures, and is fully suitable for calculations of general multi-component two-phase interfaces.

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“…A description of multi-zone approaches for HCCI/PCI simulation would be incomplete without the mention of a parallel ongoing effort by researchers like Hergart et al [24], Barths et al [25], Felsch et al [26] and others, who do not fully couple CFD and multi-zone chemical kinetics, but pass mixing information from the CFD solution to a multi-zone code which runs in parallel to the CFD solver. In these approaches, which are based on the probability density function (PDF) method, chemistry is solved in the phase space and not Downloaded by [University of Phoenix] at 01:10 04 February 2015 in the physical space as in the previously described fully coupled multi-zone approaches [13,20,21,23].…”

Section: Introductionmentioning

confidence: 99%

An extended multi-zone combustion model for PCI simulation

Kodavasal

Keum

Babajimopoulos

2011

Combustion Theory and Modelling

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Novel combustion modes are becoming an important area of research with emission regulations more stringent than ever before, and with fuel economy being assigned greater importance every day. Homogeneous Charge Compression Ignition (HCCI) and Premixed Compression Ignition (PCI) modes in particular promise better fuel economy and lower emissions in internal combustion engines.Multi-zone combustion models have been popular in modelling HCCI combustion. In this work, an improved multi-zone model is suggested for PCI combustion modelling. A new zoning scheme is suggested based on incorporating the internal energy of formation into an earlier conventional HCCI multi-zone approach, which considers a two-dimensional reaction space defined by equivalence ratio and temperature. It is shown that the added dimension improves zoning by creating more representative zones, and thus reducing errors compared to the conventional zoning approach, when applied to PCI simulation.

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An Interactively Coupled CFD-Multi-Zone Approach to Model HCCI Combustion

Cited by 14 publications

References 44 publications

A Dynamic Simulation Strategy for PCCI Combustion Control Design

A Dynamic Simulation Strategy for PCCI Combustion Control Design

Gradient Theory simulations of pure fluid interfaces using a generalized expression for influence parameters and a Helmholtz energy equation of state for fundamentally consistent two-phase calculations

An extended multi-zone combustion model for PCI simulation

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