Large-eddy simulations for internal combustion engines – a review

Rutland, Christopher J.

doi:10.1177/1468087411407248

Cited by 236 publications

(154 citation statements)

References 168 publications

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“…With increased computational capabilities, more details, such as cyclic variability (Cycle-to-Cycle Variation, CCV) can be addressed using multi-cycle Large-Eddy Simulation (LES), that has been evolving since the 1990s [2]. Since then, LES has been used to simulate flow and combustion in modern engine concepts such as four-valve pent-roof spark-ignition, Diesel, and HCCI engines [3][4][5][6][7][8][9]. These simulations of comprehensive and complex engine architecture are useful not only to guide engine development but also to identify the needed improvements in the LES approaches.…”

Section: Introductionmentioning

confidence: 99%

TCC-III Engine Benchmark for Large-Eddy Simulation of IC Engine Flows

Schiffmann

Gupta

Reuss

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-A collaborative effort is described to benchmark the TCC-III engine, and to illustrate the application of this data for the evaluation of sub-grid scale models and valve simulation details on the fidelity of Large-Eddy Simulations (LES). The TCC-III is a spark ignition 4-stroke 2-valve engine with a flat head and piston and is equipped with a full quartz liner for maximum optical access that allows high-speed flow measurements with Particle Image Velocimetry (PIV); the TCC-III has new valve seats and a modified intake-system compared to previous configurations. This work is an extension of a previous study at an engine speed of 800 RPM and an intake manifold pressure (MAP) of 95 kPa, where a one-equation eddy viscosity LES model yielded accurate qualitative and quantitative predictions of ensemble averaged mean and RMS velocities during the intake and compression stroke. Here, experimental data were acquired with parametric variation of engine speed and intake manifold absolute pressure to assess the capability of LES models over a range of operating conditions of practical relevance. This paper focuses on the repeatability and accuracy of the measured PIV data, acquired at 1 300 RPM, at two different MAP (95 kPa and 40 kPa), and imaged at multiple data planes and crank angles. Two examples are provided, illustrating the application of this data to LES model development. In one example, the experimental data are used to distinguish between the efficacies of a one-equation eddy viscosity model versus a dynamic structure one-equation model for the sub-grid stresses. The second example addresses the effects of numerical intake-valve opening strategy and local mesh refinement in the valve curtain.Résumé -Benchmark de moteur de référence TCC-III pour la simulation aux grandes échelles (Large-Eddy Simulations, LES) de l'écoulement dans les moteurs à combustion interne -Un projet collaboratif est décrit, visant à caractériser le moteur TCC-III et à illustrer l'application de ces données pour l'évaluation de modèles de sous-maille et des détails de simulation des soupapes sur la fidélité de simulations aux grandes échelles. Le TCC-III est un moteur à allumage commandé 4 temps à deux

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Section: Introductionmentioning

confidence: 99%

TCC-III Engine Benchmark for Large-Eddy Simulation of IC Engine Flows

Schiffmann

Gupta

Reuss

et al. 2015

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Particularly, flow features which are more influential for engine performance. This should be mainly due to the present SGS model where a separate transport equation is solved for SGS kinetic energy as pointed out in [51]. A rudimentary SGS model requires finer meshes for good results whereas, a well-engineered model would provide better results with coarser meshes.…”

Section: Modelling Engine Combustionmentioning

confidence: 99%

Large Eddy Simulation of Premixed Combustion in Spark Ignited Engines Using a Dynamic Flame Surface Density Model

Ranasinghe

Malalasekera

Clarke

2013

SAE Int. J. Engines

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“…The advantage of LES lies in the direct computation of the large scale flow structures that enables a better description of the turbulence and ultimately its interaction with chemistry. These improvements facilitate the use of LES for robust design since the effect of small design changes can be captured using LES [1]. However, the computational cost of LES studies is significantly larger than RANS studies.…”

Section: Introductionmentioning

confidence: 99%

LES of Gas Exchange in IC Engines

Mittal

Kang

Doran

et al. 2013

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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and available online here Cet article fait partie du dossier thématique ci-dessous publié dans la revue OGST, Vol. 69, n°1, et téléchargeable ici D o s s i e rDOSSIER Edited by/Sous la direction de : C. Angelberger IFP Energies nouvelles International Conference / Les Rencontres Scientifiques d'IFP Energies nouvelles LES4ICE 2012 -Large Eddy Simulation for Internal Combustion Engine FlowsLES4ICE 2012 -La simulation aux grandes échelles pour les écoulements dans les moteurs à combustion interne Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014) Abstract -LES of Gas Exchange in IC Engines -As engine technologies become increasingly complex and engines are driven to new operating points, understanding transient phenomena is important to ensure reliable engine operation. Unlike Reynolds Averaged Navier-Stokes (RANS) studies that only provide cycle-averaged information, Large Eddy Simulation (LES) studies are capable of simulating cycle-to-cycle dynamics. In this work, a finite difference based structured methodology for LES of IC engines is presented. This structured approach allows for an efficient mesh generation process and provides potential for higher order numerical accuracy. An efficient parallel scalable block decomposition is done to overcome the challenges associated with the low ratio of fluid elements to overall mesh elements. The motion of the valves and piston is handled using a dynamic cell blanking approach and the Arbitrary Lagrangian Eulerian (ALE) method, respectively. Modified three-dimensional Navier-Stokes Characteristic Boundary Conditions (NSCBC) Oil & Gas Science and Technology -Rev. IFP Energies nouvelles, Vol. 69 (2014), No. 1, pp. 29-40 Copyright Ó 2013, IFP Energies nouvelles DOI: 10.2516 are used in the simulation to prescribe conditions in the manifolds. The accuracy of the simulation framework is validated using various canonical configurations. Flow bench simulations of an axisymmetric configuration and an actual engine geometry are done with the LES methodology. Simulations of the gas exchange in an engine under motored conditions are also performed. Overall, good agreement is obtained with experiments for all the cases. Therefore, this framework can be used for LES of engine simulations. In the future, reactive LES simulations will be performed using this framework.

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Large-eddy simulations for internal combustion engines – a review

Cited by 236 publications

References 168 publications

TCC-III Engine Benchmark for Large-Eddy Simulation of IC Engine Flows

TCC-III Engine Benchmark for Large-Eddy Simulation of IC Engine Flows

Large Eddy Simulation of Premixed Combustion in Spark Ignited Engines Using a Dynamic Flame Surface Density Model

LES of Gas Exchange in IC Engines

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