A Study of Two Basic Issues Relevant to RANS Simulations of Stratified Turbulent Combustion in a Spray-Guided Direct-Injection Spark-Ignition Engine

Huang, Chen; Lipatnikov, Andrei; Johansen, Lars Christian Riis; Hemdal, Stina

doi:10.4271/2014-01-2572

Cited by 3 publications

(5 citation statements)

References 33 publications

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“…where L is integral length scale when applied to the flame brush thickness in the flame speed closure (FSC) model. 4 Here, the length scale used for L is the cylinder radius.…”

Section: Burned Gas Expansionmentioning

confidence: 99%

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Thermodynamic modelling of a stratified charge spark ignition engine

Smith

Roberts

Kountouriotis

et al. 2018

International Journal of Engine Research

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Combustion of a charge with spatially and temporally varying equivalence ratio in a spark ignition engine was modelled using the Leeds University Spark Ignition Engine quasi-dimensional thermodynamic code. New sub-models have been integrated into Leeds University Spark Ignition Engine that simulate the effect of burnt gas expansion and turbulent mixing on an initial equivalence ratio distribution. Realistic distribution functions were used to model the radially varying equivalence ratio. The new stratified fuel model was validated against experimental data, showing reasonable agreement for both the pressure trace and percentage heat released. Including the effect of turbulent mixing was found to be important to reproduce the trend in the differences between the stratified and homogeneous simulations.

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“…where L is integral length scale when applied to the flame brush thickness in the flame speed closure (FSC) model. 4 Here, the length scale used for L is the cylinder radius.…”

Section: Burned Gas Expansionmentioning

confidence: 99%

“…So far, modelling of stratified charge and the effects of late injection have been predominantly carried out using CFD. [4][5][6][7][8][9] However, some research exists into quasidimensional stratified fuel models. [10][11][12][13] For example, the stratified model developed by Aghdam 10 used a radially varying equivalence ratio.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic modelling of a stratified charge spark ignition engine

Smith

Roberts

Kountouriotis

et al. 2018

International Journal of Engine Research

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show abstract

“…A brief discussion of such model is presented here; interested readers are referred to Refs. [5,6,7] for further details.…”

Section: Methodsmentioning

confidence: 99%

“…The second important phenomenon addressed by the combustion model is the effect of fluctuations in mixture fraction on turbulent burning rate. Such phenomenon was modelled by combining the FSC model for premixed turbulent combustion with a presumed PDF in a form of beta function [5,6].…”

Section: Methodsmentioning

confidence: 99%

“…In previous papers, a so-called Flame Speed Closure (FSC) model for premixed turbulent combustion was combined with a presumed Probability Density Function (PDF) approach to address the effect of fluctuations in mixture composition on burning rate [5,6]. Such combined model was implemented into OpenFOAM ® to study the stratified turbulent combustion in a SG GDI engine.…”

Section: Introductionmentioning

confidence: 99%

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Numerical and Experimental Study of Stratified Turbulent Combustion in a Spray-Guided Gasoline Direct Injection Engine

Huang

Lipatnikov

Johansen

et al. 2015

Sustainable Automotive Technologies 2014

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Direct Injection (DI) of gasoline into cylinder of a Spark Ignition (SI) engine is widely recognized to be a promising technology capable for significantly reducing fuel consumption and carbon dioxide emissions as compared to a port-fuel injection SI engine. In particular, spray-guided (SG) GDI combustion systems allow for further improvement in fuel efficiency. Moreover, efficient CFD tools for numerical simulations of spray and combustion processes have been becoming increasingly important in engine development. In previous papers, a so-called Flame Speed Closure (FSC) model was implemented into an open source code OpenFOAM ® with the capability of addressing important phenomena in SG GDI engines, e.g. fluctuations in mixture composition and the proper evaluation of combustion temperature for the products. In this paper, the aforementioned FSC model is applied to investigate the stratified turbulent combustion in a SG GDI engine in the frame work of unsteady 3D Reynolds-Averaged Navier-Stokes (RANS) simulations. The computed results are compared with the measured pressure traces obtained in the same research group for both low and medium load conditions. Further on, the calculated Reynolds-averaged progress variable is compared to the experimentally observed images.

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Modeling of the Influence of Mixture Fraction Fluctuations on Burning Rate in Partially Premixed Turbulent Flames

Lipatnikov

Huang

2014

Combustion Science and Technology

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A Study of Two Basic Issues Relevant to RANS Simulations of Stratified Turbulent Combustion in a Spray-Guided Direct-Injection Spark-Ignition Engine

Cited by 3 publications

References 33 publications

Thermodynamic modelling of a stratified charge spark ignition engine

Thermodynamic modelling of a stratified charge spark ignition engine

Numerical and Experimental Study of Stratified Turbulent Combustion in a Spray-Guided Gasoline Direct Injection Engine

Modeling of the Influence of Mixture Fraction Fluctuations on Burning Rate in Partially Premixed Turbulent Flames

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