LES and RNG turbulence modeling in DI diesel engines

Ossi Kaario; Heikki Pokela; Lars Kjäldman; Jukka Tiainen; Martti Larmi

doi:10.4271/2003-01-1069

LES and RNG turbulence modeling in DI diesel engines

Ossi Kaario, Heikki Pokela, Lars Kjäldman, Jukka Tiainen, Martti Larmi

Helsinki University of Technology

Research output: Contribution to journal › Article in a proceedings journal › Scientific › peer-review

11 Citations (Scopus)

Abstract

The one-equation subgrid scale model for the Large Eddy Simulation (LES) turbulence model has been compared to the popular k-ε RNG turbulence model in very different sized direct injection diesel engines. The cylinder diameters of these engines range between 111 and 200 mm. This has been an initial attempt to study the effect of LES in diesel engines without any modification to the combustion model being used in its Reynolds-averaged Navier-Stokes (RANS) form. Despite some deficiencies in the current LES model being used, it already gave much more structured flow field with approximately the same kind of accuracy in the cylinder pressure predictions than the k-ε RNG turbulence model.

Original language	English
Number of pages	9
Journal	SAE Technical Paper Series
Issue number	2003-01-1069
DOIs	https://doi.org/10.4271/2003-01-1069
Publication status	Published - 2003
MoE publication type	A4 Article in a conference publication
Event	SAE World Congress and Exhibition 2003 : Computer-Aided Engineering of Vehicle and Engine Systems and Components - Detroit, United States Duration: 3 Mar 2003 → 6 Mar 2003

Keywords

turbulence modeling
LES
RNG
diesel engines, combustion
emissions

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10.4271/2003-01-1069

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title = "LES and RNG turbulence modeling in DI diesel engines",

abstract = "The one-equation subgrid scale model for the Large Eddy Simulation (LES) turbulence model has been compared to the popular k-ε RNG turbulence model in very different sized direct injection diesel engines. The cylinder diameters of these engines range between 111 and 200 mm. This has been an initial attempt to study the effect of LES in diesel engines without any modification to the combustion model being used in its Reynolds-averaged Navier-Stokes (RANS) form. Despite some deficiencies in the current LES model being used, it already gave much more structured flow field with approximately the same kind of accuracy in the cylinder pressure predictions than the k-ε RNG turbulence model.",

keywords = "turbulence modeling, LES, RNG, diesel engines, combustion, emissions",

author = "Ossi Kaario and Heikki Pokela and Lars Kj{\"a}ldman and Jukka Tiainen and Martti Larmi",

year = "2003",

doi = "10.4271/2003-01-1069",

language = "English",

journal = "SAE Technical Paper Series",

issn = "0148-7191",

publisher = "Society of Automotive Engineers SAE",

number = "2003-01-1069",

note = "SAE World Congress and Exhibition 2003 : Computer-Aided Engineering of Vehicle and Engine Systems and Components ; Conference date: 03-03-2003 Through 06-03-2003",

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TY - JOUR

T1 - LES and RNG turbulence modeling in DI diesel engines

AU - Kaario, Ossi

AU - Pokela, Heikki

AU - Kjäldman, Lars

AU - Tiainen, Jukka

AU - Larmi, Martti

PY - 2003

Y1 - 2003

N2 - The one-equation subgrid scale model for the Large Eddy Simulation (LES) turbulence model has been compared to the popular k-ε RNG turbulence model in very different sized direct injection diesel engines. The cylinder diameters of these engines range between 111 and 200 mm. This has been an initial attempt to study the effect of LES in diesel engines without any modification to the combustion model being used in its Reynolds-averaged Navier-Stokes (RANS) form. Despite some deficiencies in the current LES model being used, it already gave much more structured flow field with approximately the same kind of accuracy in the cylinder pressure predictions than the k-ε RNG turbulence model.

AB - The one-equation subgrid scale model for the Large Eddy Simulation (LES) turbulence model has been compared to the popular k-ε RNG turbulence model in very different sized direct injection diesel engines. The cylinder diameters of these engines range between 111 and 200 mm. This has been an initial attempt to study the effect of LES in diesel engines without any modification to the combustion model being used in its Reynolds-averaged Navier-Stokes (RANS) form. Despite some deficiencies in the current LES model being used, it already gave much more structured flow field with approximately the same kind of accuracy in the cylinder pressure predictions than the k-ε RNG turbulence model.

KW - turbulence modeling

KW - LES

KW - RNG

KW - diesel engines, combustion

KW - emissions

U2 - 10.4271/2003-01-1069

DO - 10.4271/2003-01-1069

M3 - Article in a proceedings journal

SN - 0148-7191

JO - SAE Technical Paper Series

JF - SAE Technical Paper Series

IS - 2003-01-1069

T2 - SAE World Congress and Exhibition 2003

Y2 - 3 March 2003 through 6 March 2003

ER -

LES and RNG turbulence modeling in DI diesel engines

Abstract

Keywords

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