Editorial — ‘Thermo- and Fluid-Dynamic Processes in Direct Injection Engines’: THIESEL 2018 Special Issue by Xandra Margot

Margot, Xandra

doi:10.1177/1468087418820951

Cited by 3 publications

(2 citation statements)

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“…Furthermore, given the continuous request for reduction of pollutant emissions of GDI engines, it is also mandatory to identify the weaknesses of a direct injection approach such as soot formation, related to injector tip wetting 4 , and generation of unburned hydrocarbons and nanoparticles. 5,6 Within this context, the Engine Combustion Network (ECN) made available an eight-hole GDI injector, named Spray G and made by Delphi, both for experimental and numerical validation activities which were carried out during the years by many universities, motor companies and research centers. Different operating conditions can be tested, ranging from flash boiling to late injection events, thanks to a wide dataset made available on the ECN website.…”

Section: Introductionmentioning

confidence: 99%

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Validation of a comprehensive computational fluid dynamics methodology to predict the direct injection process of gasoline sprays using Spray G experimental data

Paredi

Lucchini

Onorati

et al. 2019

International Journal of Engine Research

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A detailed prediction of injection and air–fuel mixing is fundamental in modern direct injection, spark-ignition engines to guarantee a stable and efficient combustion process and to minimize pollutant formation. Within this context, computational fluid dynamics simulations nowadays represent a powerful tool to understand the in-cylinder evolution of spray and air–fuel charge. To guarantee the accuracy of the adopted multidimensional spray sub-models, it is mandatory to validate the computed results against available experimental data under well-defined operating conditions. To this end, in this work, the authors proposed the calibration and validation of a comprehensive set of spray sub-models by means of the simulation of the Spray G experiment, available in the context of the engine combustion network. For a suitable validation of the proposed numerical setup in addition to the baseline condition, gasoline direct injection operating points typical of early injection with homogeneous operation, late injection with high ambient density and flash boiling with enhanced fuel evaporation were also simulated. Numerical computations were validated against a wide set of available experimental data by means of an accurate post-processing analysis taking into account axial liquid and vapor penetrations, gas-phase velocity between spray plumes, droplet size, plume liquid velocity, direction and mass distribution. Satisfactory results were achieved with the proposed setup, which is able to predict gasoline spray evolution under different operating conditions.

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Section: Introductionmentioning

confidence: 99%