Combustion process optimization for oxymethylene ether fuels in a heavy‑duty application

Gaukel, Kai; Dworschak, Patrick; Pélerin, Dominik; Härtl, Martin; Wachtmeister, Georg

doi:10.1007/978-3-658-26528-1_21

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…13 shows the temperature contours for the diesel reference diesel case, the baseline OME case (with the same geometry of the initial diesel engine) using OME as fuel and the best case obtained from the optimization. Mainly, the changes in the bowl profile increases the distance between the nozzle hole outlet and the walls of the piston bowl, which is in agreement with previous studies [17,14], that presented larger combustion chambers when oxygenated fuels are used due to the longer mixing lengths for those fuel sprays. In addition, the optimized case exhibits a faster jet penetration, which occurs due to bigger orifice diameters and higher injection pressure.…”

Section: Tablesupporting

confidence: 92%

“…Most of previous studies done with these fuels have been carried out for pre-existing conventional engine architectures, however recent studies report that the performance could be further improved by adapting the combustion system configuration to the chemical requirements of this renewable fuel. In this regard, Gaukel et al [14] reported an experimental and computational study on an engine fueled with OME, where they tested 10 different piston bowl shape configurations. From all the bowl piston configurations that were evaluated, they found a combination that reduced the NO x emissions and maintained the indicated efficiency at the same time.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Combustion system optimization for the integration of e-fuels (Oxymethylene Ether) in compression ignition engines

Novella

Bracho

Gómez-Soriano

et al. 2021

Fuel

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Section: Tablesupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Combustion system optimization for the integration of e-fuels (Oxymethylene Ether) in compression ignition engines

Novella

Bracho

Gómez-Soriano

et al. 2021

Fuel

View full text Add to dashboard Cite

“…The effects of a bigger bottom-bowl radius are the idea behind V4. Geometries V5 and V6 consist of a wider bowl diameter to realize a more uniform temperature field and, therefore, less CO emissions [6,34].Piston-bowl geometry V7 is making use of a deeper bowl, which showed good results regarding piston work and UHC emissions in [35]. The last piston-bowl geometry V8 is a combination of V4 and V5.…”

Section: Geometry Variationmentioning

confidence: 99%

Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

et al. 2022

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This paper describes the simulative approach to calibrate an already extremely highly turbocharged industrial diesel engine for higher low-speed torque. The engine, which is already operating at its cylinder-pressure maximum, is to achieve close to 30 bar effective mean pressure through suitable calibration between the compression ratio, piston-bowl shape and injection strategy. The basic idea of the study is to lower the compression ratio for even higher injection masses and boost pressures, with the resulting disadvantages in the area of emissions and fuel consumption being partially compensated for by optimizations in the areas of piston shape and injection strategy. The simulations primarily involve the use of the 3D CFD software Converge CFD for in-cylinder calibration and a fully predictive 1D full-engine model in GT Suite. The simulations are based on a two-stage turbocharged 1950 cc four-cylinder industrial diesel engine, which is used for validation of the initial simulation. With the maximum increase in fuel mass and boost pressure, the effective mean pressure could be increased up to 28 bar, while specific consumption increased only slightly. Depending on the geometry, NOx or CO and UHC emissions could be reduced.

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Numerical Validation and Optical Study of Injection of Different Oxymethylene Ether Fuels for Heavy-Duty Application

Gaukel

Pélerin

Dworschak

et al. 2023

SAE Int. J. Fuels Lubr.

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<div>A reliable toolchain for the validation and evaluation of numerical spray break-up simulation for the potentially carbon-neutral fuels polyoxymethylene dimethylether (POMDME, or short OME) is developed and presented. The numerical investigation is based on three-dimensional computational fluid dynamics (3D-CFD) with the commercial code STAR-CD v2019.1 using a Reynolds-averaged Navier-Stokes (RANS) equations approach. Fuel properties of the representatives OME1 and OME3 are implemented into the software and with that the fuels are investigated numerically.</div> <div>For validation purposes, optical experimental results in a heated spray chamber with inert nitrogen-pressurized atmosphere are presented. The measurement data are based on Mie scattering of the liquid phase and Schlieren imaging of the vapor phase. Solely experimental results are shown for OME1b and OME3–6 to assess if the knowledge from the numerical modeling with OME1 and OME3 can also be transferred to the corresponding multicomponent fuels. While the results for a match between OME3 and OME3–6 are close, the measurement for OME1b exceeds the result of OME1 in the liquid penetration significantly. This is explained by the molecular structure of the low-volatile additive in OME1b based on long-chained polyglycol ethers. For the numerically modeled operating conditions, the fuel injection rate with the corresponding fuel is measured. Two atomization and spray break-up approaches are investigated in simulation, based on Reitz-Diwakar (RD) models and a combination using Huh’s atomization and the Kelvin-Helmholtz Rayleigh-Taylor (KHRT) spray break-up models. A holistic parameter study in a single operating point with the fuel OME1 helps to determine the sensitivities of the models. Adjustments to the spray momentum by a variation of the parameter for the nozzle hole diameter are used to get results closely aligned with measurement data. The transfer of the calibrated RD model to a validation study with OME3 at different operating conditions matches well to measurement with no further adjustments necessary.</div>

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Combustion process optimization for oxymethylene ether fuels in a heavy‑duty application

Cited by 4 publications

References 15 publications

Combustion system optimization for the integration of e-fuels (Oxymethylene Ether) in compression ignition engines

Combustion system optimization for the integration of e-fuels (Oxymethylene Ether) in compression ignition engines

Computational Investigation on the Performance Increase of a Small Industrial Diesel Engine Regarding the Effects of Compression Ratio, Piston Bowl Shape and Injection Strategy

Numerical Validation and Optical Study of Injection of Different Oxymethylene Ether Fuels for Heavy-Duty Application

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