Thermochemistry Study of Internal Combustion Engine

Bouras, Fethi; Soudani, A.; Ameur, Mohamed

doi:10.1016/j.egypro.2012.05.123

Cited by 13 publications

(10 citation statements)

References 11 publications

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“…The burner is confined by two coaxial jets, the central one has an internal ray R 1 =0.03157 m and an external R 2 =0.03175 m, which injects the methane and/or hydrogen with inlet mass flow rate and temperature respectively Q 1 =0.0072 kg/s and T 1 =300K. The annular one has an internal ray R 3 = 0.04685m, that injects the air with an inlet mass flow rate Q2=0.137 kg/s and preheated at a temperature T2=750K [4][5][6]. …”

Section: Computational Domain and Boundaries Conditionsmentioning

confidence: 99%

“…Therefore, we focus on the assumption of Boussinesq in which the small scales influence the large scales via the subgrid-scale stress [4][5][6][7][8][9]:…”

Section: Dynamic Turbulence Modellingmentioning

confidence: 99%

“…Since the modeling methods employed in this study are summarized in this section. The filtered governing equations in LES for turbulent combustion can be written in Cartesian coordinates as [4][5][6][7][8][9]:…”

Section: Governing Equationsmentioning

confidence: 99%

“…Furthermore, the hydrogen addition shifts the reaction zone to upstream locations of the flame to cause increased concentration of OH radicals. And, the increase in the temperatures consequently increases the NO formation rate in the reaction zone [2,4,5].…”

Section: Introductionmentioning

confidence: 99%

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Improvements of the combustion characteristics by the hydrogen enrichment

Bouars

Attia

Khaldi

2015

2015 3rd International Conference on Control, Engineering &Amp; Information Technology (CEIT)

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In this work, we present a computational study of the turbulent diffusion flame in cylindrical combustor confined by two coaxial jets (Methane/Hydrogen and Air), in order to improve the reactive mixture, the reactants combustion and to reduce the carbon monoxide as pollutant chemical specie. Hereby, the coupled models LES/PDF are used to surmount the turbulence/chemistry interaction in the transport equations of chemical species. Whereas, the predict mixture fraction, the progress variable and the carbon monoxide mass fraction are selected to validate with the experimental references data. Furthermore, the same scalar parameters which are considered in the previous numerical validation are evaluated from different fuel compositions of the hydrogen and the methane percentage to supply the combustion chamber. The hydrogen addition reduces the carbon monoxide in the combustion products and improves the reactants burn caused by the rich mixture.

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Section: Computational Domain and Boundaries Conditionsmentioning

confidence: 99%

“…Therefore, we focus on the assumption of Boussinesq in which the small scales influence the large scales via the subgrid-scale stress [4][5][6][7][8][9]:…”

Section: Dynamic Turbulence Modellingmentioning

confidence: 99%

Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improvements of the combustion characteristics by the hydrogen enrichment

Bouars

Attia

Khaldi

2015

2015 3rd International Conference on Control, Engineering &Amp; Information Technology (CEIT)

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“…The β-function as a model for the statistical distribution of the mixture fractions performs much better than the commonly used subgrid scale models. Equation (3) becomes [21,22,[25][26][27] …”

Section: Probability Density Functionmentioning

confidence: 99%

Numerical study of turbulent structures for lean premixed prevaporized combustion

Bouras

2014

J Appl Mech Tech Phy

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In this paper we demonstrate the advantages of the LES-WALE model coupled with the PDF approach to resolve a set of aerothermochemistry equations for turbulent lean premixed prevaporized combustion. The main issue is the modeling of the closure in the turbulent combustion equations. So, combustion problems involve a strong coupling between dynamic and scalar parameters. The validation is based on comparisons of three parameters: mean longitudinal velocity, fluctuation of longitudinal velocity, and length of recirculation zones. In line with what was observed by an experimental reference study, the simulation succeeds to detect the flame zone and to model the flow morphology for different equivalence ratios and inlet mass flow rates.

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Computational modeling of thermodynamic irreversibilities in turbulent non-premixed combustion

Bouras

Khaldi

2015

Heat Mass Transfer

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Thermochemistry Study of Internal Combustion Engine

Cited by 13 publications

References 11 publications

Improvements of the combustion characteristics by the hydrogen enrichment

Improvements of the combustion characteristics by the hydrogen enrichment

Numerical study of turbulent structures for lean premixed prevaporized combustion

Computational modeling of thermodynamic irreversibilities in turbulent non-premixed combustion

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