Directions in turbulence modeling for in-cylinder flows in reciprocating engines

Tahry, S. H. El; Haworth, Daniel C.

doi:10.2514/3.23590

Cited by 39 publications

(12 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unsteady threedimensional RANS has been the approach of choice for incylinder flows for many years. Moreover, it has been argued (El Tahry and Haworth, 1992;Haworth and Jansen, 1998) that the computational meshes typically used for RANS modeling of practical in-cylinder configurations (currently 10 5 to 10 6 computational elements with second-order spatial discretization) already are sufficient to capture 80-90% of the flowÕs kinetic energy.…”

Section: Les and Enginesmentioning

confidence: 99%

“…This configuration has been the subject of exhaustive numerical studies using a variety of RANS models and numerical methods (El Tahry, 1985;El Tahry and Haworth, 1992).…”

Section: A Reciprocating Piston-cylinder Assembly With Fixed Central mentioning

confidence: 99%

“…These advantages are particularly compelling for the IC-engine application (El Tahry and Haworth, 1992;Haworth and Jansen, 1998). Computations of turbulent flows based on spatially filtered equations are known as Òlarge-eddy simulationÓ or LES.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Large-Eddy Simulation of in-Cylinder Flows

Haworth

1999

Oil & Gas Science and Technology - Rev. IFP

Self Cite

119

View full text Add to dashboard Cite

RŽsumŽ Ñ Simulation ˆ grande Žchelle des Žcoulements internes dans les moteurs Ñ Les progr•s des mod•les physiques, des mŽthodes numŽriques et de la puissance de calcul permettent quÕon puisse prendre en considŽration les simulations ˆ grande Žchelle (LES) pour le calcul des Žcoulements turbulents dans les moteurs. La synth•se prŽsentŽe comprend : une discussion sur la LES montrant ses diffŽrences avec la modŽlisation aux moyennes de Reynolds (RANS) ; les motivations pour passer ˆ la LES pour les Žcoulements internes aux moteurs ; des rŽsultats quantitatifs pour deux configurations de moteur entra"nŽ. Des mod•les de sous-maille Ç dynamique È des tenseurs sont dŽveloppŽs, par ailleurs, nous discutons des rŽsultats donnŽs par deux approches numŽriques diffŽrentes. En comparaison avec la mŽthodologie RANS, la LES requiert peu dÕapports empiriques, donne plus de dŽtails sur la structure de lÕŽcoulement dans le cylindre et permet lÕanalyse de phŽno-m•nes jusquÕalors inaccessibles, comme les variations cycliques. Mots-clŽs : simulation, LES, moteurs. Abstract Ñ Large-Eddy Simulation of In-Cylinder Flows Ñ Advances in physical models, numerical methods, and computational power together have brought large-eddy simulation (LES) to the point where it warrants serious consideration for computing in-cylinder turbulent flows. This article includes: a discussion of LES and how it differs from Reynolds-averaged Navier Stokes (RANS) modeling

show abstract

Section: Les and Enginesmentioning

confidence: 99%

“…This configuration has been the subject of exhaustive numerical studies using a variety of RANS models and numerical methods (El Tahry, 1985;El Tahry and Haworth, 1992).…”

Section: A Reciprocating Piston-cylinder Assembly With Fixed Central mentioning

confidence: 99%

See 1 more Smart Citation

Large-Eddy Simulation of in-Cylinder Flows

Haworth

1999

Oil & Gas Science and Technology - Rev. IFP

Self Cite

119

View full text Add to dashboard Cite

show abstract

“…Generally speaking it is poorest during the induction stroke, especially with regard to the turbulence intensity, which is usually substantially underpredicted [21,22]. Better and often satisfactory agreement is however obtained later in the engine cycle (e.g.…”

Section: Turbulence Modelingmentioning

confidence: 99%

“…Other turbulence representations have been explored, including complex Reynolds stress transport models [20,21], but lack of widespread use suggests that the benefits, if any, are marginal. Given that a similar picture exists in other areas of CFD application, this is scarcely surprising.…”

Section: Turbulence Modelingmentioning

confidence: 99%

State of the Art of Multi-Dimensional Modeling of Engine Reacting Flows

Gosman

1999

Oil & Gas Science and Technology - Rev. IFP

View full text Add to dashboard Cite

RŽsumŽ Ñ ƒtat de lÕart de la modŽlisation multidimensionnelle pour les Žcoulements rŽactifs dans les moteurs Ñ Cet article dresse un aper•u de lÕŽtat de lÕart et des perspectives de lÕutilisation de la modŽlisation 3D pour lÕanalyse et le dŽveloppement des moteurs. Les aspects abordŽs comprennent lÕacquisition des gŽomŽtries, la gŽnŽration des maillages, les mŽthodologies numŽriques, la modŽlisation mathŽmatique des phŽnom•nes physiques importants, lÕexploitation des calculateurs parall•les et lÕapplication industrielle. Les conclusions principales de cette analyse font appara"tre les points suivants : Ð les mŽthodologies numŽriques et la gŽnŽration des maillages, associŽes au calcul parall•le, permettent maintenant de raccourcir notablement le cycle total de simulation ; Ð la modŽlisation physique a atteint sa maturitŽ dans la plupart des aspects relatifs ˆ la simulation de la combustion en allumage commandŽ ; en revanche, elle reste encore ˆ acquŽrir en ce qui concerne la combustion Diesel et certains aspects des processus reliŽs aux sprays ; Ð globalement, lÕutilisation de la simulation 3D pour la conception des moteurs est en forte augmentation ; Ð les dŽveloppements futurs, dont lÕutilisation de la LES, promettent une amŽlioration croissante des rŽsultats.Mots-clŽs : moteur, combustion, simulation 3D, aper•u. Abstract Ñ State of the Art of Multi-Dimensional Modeling of Engine Reacting Flows

show abstract