Assessment of Single- and Two-Zone Turbulence Formulations for Quasi-Dimensional Modeling of Spark-Ignition Engine Combustion

Agarwal, Apoorva; Filipi, Zoran; Assanis, Dennis N.; Baker, Douglas M.

doi:10.1080/00102209808924163

Cited by 28 publications

(15 citation statements)

References 20 publications

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“…It is known from literature [6,[8][9][10] that the in-cylinder turbulent flow field can be considered to be homogeneous and isotropic during the late part of the compression stroke and near TDC. Since equations of the zero dimensional approach are derived assuming the homogenous and isotropic turbulent flow field, the turbulence model is applied only to the high pressure cycle.…”

Section: Single Zone K-e Turbulence Modelmentioning

confidence: 99%

“…The demand for turbulence modeling comes as a consequence of increased demand for quasi-dimensional combustion models which require an accurate prediction of the turbulent flow field inside the combustion chamber [4][5][6][7]. Various turbulence models for the simulations of SI engines have been developed and analyzed in the last few decades.…”

Section: Introductionmentioning

confidence: 99%

“…Tabaczynski [9] showed that the piston geometry can significantly change the evolution of the turbulent kinetic energy (k) during the high pressure cycle (HPC). Agarwal et al [6] showed different single and two zone turbulence model formulations (algebraic e model and k-e turbulence model) which were applied to the quasi-dimensional SI combustion model. The results were analyzed but they were not validated with experimental data.…”

Section: Introductionmentioning

confidence: 99%

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Development of a two zone turbulence model and its application to the cycle-simulation

2014

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The development of a two zone k-e turbulence model for the cycle-simulation software is presented. The in-cylinder turbulent flow field of internal combustion engines plays the most important role in the combustion process. Turbulence has a strong influence on the combustion process because the convective deformation of the flame front as well as the additional transfer of the momentum, heat, and mass can occur. The development and use of numerical simulation models are prompted by the high experimental costs, lack of measurement equipment and increase in computer power. In the cycle-simulation codes, multi zone models are often used for rapid and robust evaluation of key engine parameters. The extension of the single zone turbulence model to the two zone model is presented and described. Turbulence analysis was focused only on the high pressure cycle according to the assumption of the homogeneous and isotropic turbulent flow field. Specific modifications of differential equation derivatives were made in both cases (single and two zone). Validation was performed on two engine geometries for different engine speeds and loads. Results of the cycle-simulation model for the turbulent kinetic energy and the combustion progress variable are compared with the results of 3-D computational fluid dynamics simulations. Very good agreement between the turbulent kinetic energy during the high pressure cycle and the combustion progress variable was obtained. The two zone k-e turbulence model showed a further progress in terms of prediction of the combustion process by using only the turbulent quantities of the unburned zone.

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Section: Single Zone K-e Turbulence Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Development of a two zone turbulence model and its application to the cycle-simulation

2014

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“…A comprehensive assessment of various quasidimensional models was presented by Agarwal et al [5] and Verhelst and Sheppard [6].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Illán-Gómez

Alarcón²

2010

Applied Thermal Engineering

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“…QD models have the advantages of both ZD and MD models due to some influence of chamber geometry and fluid motion, are fast in terms of computation time and are easy to use (Dai et al 1996;Caton 2001;Georgios 2005;Sezer 2008). For these reasons, QD models have been widely used for predicting the effects of flow parameters, mixture composition and combustion chamber geometry in SI engine combustion and heat transfer, and also overall engine performance and emissions (Agarwal et al 1998; table 1). Both ZD and QD models have been commonly used over the years for research and design studies, but most such simulation studies have been used only for the first law of thermodynamics.…”

Section: Introductionmentioning

confidence: 99%

Mathematical analysis of spark ignition engine operation via the combination of the first and second laws of thermodynamics

Sezer

Bilgin

2008

Proc. R. Soc. A.

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This study aims at the theoretical exergetic evaluation of spark ignition engine operation. For this purpose, a two-zone quasi-dimensional cycle model was installed, not considering the complex calculation of fluid motions. The cycle simulation consists of compression, combustion and expansion processes. The combustion phase is simulated as a turbulent flame propagation process. Intake and exhaust processes are also computed by a simple approximation method. The results of the model were compared with experimental data to demonstrate the validation of the model. Principles of the second law are applied to the model to perform the exergy (or availability) analysis. In the exergy analysis, the effects of various operational parameters, i.e. fuel-air equivalence ratio, engine speed and spark timing on exergetic terms have been investigated. The results of exergy analysis show that variations of operational parameters examined have considerably affected the exergy transfers, irreversibilities and efficiencies. For instance, an increase in equivalence ratio causes an increase in irreversibilities, while it decreases the first and also the second law efficiencies. The irreversibilities have minimum values for the specified engine speed and optimum spark timing, while the first and second law efficiencies reach a maximum at the same engine speed and optimum spark timing.

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Assessment of Single- and Two-Zone Turbulence Formulations for Quasi-Dimensional Modeling of Spark-Ignition Engine Combustion

Cited by 28 publications

References 20 publications

Development of a two zone turbulence model and its application to the cycle-simulation

Development of a two zone turbulence model and its application to the cycle-simulation

Numerical analysis of combustion and transient heat transfer processes in a two-stroke SI engine

Mathematical analysis of spark ignition engine operation via the combination of the first and second laws of thermodynamics

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