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

Schiffmann, Philipp; Gupta, Saurabh; Reuss, David L.; Sick, Volker; Yang, Xiaofeng; Kuo, Tang-Wei

doi:10.2516/ogst/2015028

Cited by 47 publications

(59 citation statements)

References 30 publications

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“…In this regard many of the studies arose from the Sandia Diesel engine [13,14], the GM R&D test-rig [3,15,16], the TCC-III engine in Michigan [17,18], the SGEmac (IFP) engine [19], and the Darmstadt test-rig [20][21][22]. The corresponding databases have provided a stronghold for engine simulations with regards to model validation and development.…”

Section: Chaomentioning

confidence: 99%

Evaluation of the flame propagation within an SI engine using flame imaging and LES

Kuenne

Yildar

et al. 2017

Combustion Theory and Modelling

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This work shows experiments and simulations of the fired operation of a spark ignition engine with port-fueled injection. The test-rig considered is an optically accessible single cylinder engine specifically designed at TU Darmstadt for the detailed investigation of in-cylinder processes and model validation. The engine was operated under lean conditions using isooctane as a substitute for gasoline. Experiments have been conducted to provide a sound database of the combustion process. A planar flame imaging technique has been applied within the swirl and tumble plane to provide statistical information on the combustion process to complement the pressure-based comparison between simulation and experiments. This data is then analyzed and used to assess the Large Eddy Simulation performed within this work. For the simulation, the engine code KIVA has been extended by the dynamically thickened flame model combined with chemistry reduction by means of pressure dependent tabulation. 60 cycles have been simulated to perform a statistical evaluation. Based on a detailed comparison with the experimental data, a systematic study has been conducted to obtain insight into the most crucial modeling uncertainties.

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Section: Chaomentioning

confidence: 99%

Evaluation of the flame propagation within an SI engine using flame imaging and LES

Kuenne

Yildar

et al. 2017

Combustion Theory and Modelling

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“…The engine provides optical access through a quartz cylinder liner and a quartz flat piston window. Detailed description of the engine can be found in [37], and a schematic of the engine is shown in Figure 1.…”

Section: Experimental Methodologymentioning

confidence: 99%

Large Eddy Simulations with Conjugate Heat Transfer (CHT) modeling of Internal Combustion Engines (ICEs)

Keum

Sick

2019

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

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In this study, the effects of the thermal boundary conditions at the engine walls on the predictions of Large-Eddy Simulations (LES) of a motored Internal Combustion Engine (ICE) were examined. Two thermal boundary condition cases were simulated. One case used a fixed, uniform wall temperature, which is typically used in conventional LES modeling of ICEs. The second case utilized a Conjugate Heat Transfer (CHT) modeling approach to obtain temporally and spatially varying wall temperature. The CHT approach solves the coupled heat transfer problem between fluid and solid domains. The CHT case included the solid valves, piston, cylinder head, cylinder liner, valve seats, and spark plug geometries. The simulations were validated with measured bulk flow, near-wall flow, surface temperature, and surface heat flux. The LES quality of both simulations was also discussed. The CHT results show substantial spatial, temporal, and cyclic variability of the wall heat transfer. The surface temperature dynamics obtained from the CHT model compared well with measurements during the compression stroke, but the absolute magnitude was 5 K (or 1.4%) off and the prediction of the drop in temperature after top dead center suffered from temporal resolution limitations. Differences in the predicted flow and temperature fields between the uniform surface temperature and CHT simulations show the impact of the surface temperature on bulk behavior.

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“…The LES calculations were performed for motored engine condition at engine speed of 1300 RPM and intake plenum pressure 40 kPa. The LES results were validated by the PIV measurements in the previous studies [2,3,8,9]. The flow fields over Z = À30 mm plane (the origin located on center of the flat cylinder head) are compared between PIV measurements and LES ensemble-averaged results at four crank angles: 420, 460, 540 and 660 Crank Angle Degrees (CAD) in Figure 4.…”

Section: Cfd Setup and Validationmentioning

confidence: 99%

“…An optical engine test setup was developed for the specific purpose of supporting the development and validation of a range of LES approaches [2,3]. The test setup features a single cylinder optical engine connected to intake and exhaust plenums via intake and exhaust runners, respectively.…”

Section: Tcc3 Enginementioning

confidence: 99%

“…LES captures Cycle-toCycle Variations (CCV) as opposed to cycle-averaged mean computations of RANS, and is therefore more accurate. A recent effort of GM's R&D and other organizations has been to understand and describe the nature of stochastic flows in internal combustion engines through concerted Particle Image Velocimetry (PIV) measurements and LES [2][3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Correlation of CCV Between In-Cylinder Swirl Ratio and Polar Velocity Profile in Valve Seat Region Using LES Under Motored Engine Condition

Yang¹,

Kuo²

2017

Oil & Gas Science and Technology - Rev. IFP Energies nouvel

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-An analysis of Transparent Combustion Chamber (TCC3) engine Large-Eddy Simulation (LES) result was carried out to investigate Cycle-to-Cycle Variation (CCV) correlation between incylinder swirl ratio and flow in the valve seat region of the intake port to address a challenging question on "What causes CCV of in-cylinder flow". Polar Velocity (PV) profile, mean velocities normal to a ringshaped cutting surface in the valve seat region, is calculated to depict intake port flow. A Net Polar Velocity (NPV) can be defined by performing the vector sum of the polar velocity around the intake valve. A standard deviation of PV is also calculated from azimuthal distribution of PV magnitudes relative to its mean value. The analysis of 18 LES cycles of TCC3 engine with a two-valve, pancake-shaped combustion chamber shows that similar CCV of in-cylinder swirl ratio patterns are observed at different crank angles from Intake Valve Opening (IVO) to Exhaust Valve Opening (EVO). Further analysis shows clear correlations of CCV between in-cylinder swirl ratio and NPV magnitude and the standard deviation of PV at selected crank angles from IVO to EVO. The correlations get significantly better with the ring-shaped cutting surface moves from up-stream to downstream of the valve-seat region. This study reveals that the CCV of in-cylinder swirl ratio is built up gradually from upstream to downstream in the intake port and valve-seat region. Further evaluation of the analysis method is planned for a four-valve engine as an evaluation metric for better engine intake port design and combustion chamber optimization.

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

Cited by 47 publications

References 30 publications

Evaluation of the flame propagation within an SI engine using flame imaging and LES

Evaluation of the flame propagation within an SI engine using flame imaging and LES

Large Eddy Simulations with Conjugate Heat Transfer (CHT) modeling of Internal Combustion Engines (ICEs)

Correlation of CCV Between In-Cylinder Swirl Ratio and Polar Velocity Profile in Valve Seat Region Using LES Under Motored Engine Condition

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