Research and Development of a 2.9 Liter Light-duty DME Truck Using Common Rail Fuel Injection Systems

Jeong, Soo-Jin; Park, Jung-Kwon; Oh, Sedoo; Lee, Gee-Soo; Lim, Ock-Taek; Pyo, Youngdug

doi:10.7467/ksae.2012.20.6.107

Cited by 5 publications

(1 citation statement)

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“…The Reitz-Diwakar model works by combining the effects of the so-called bag break-up and stripping break-up [36,37]. The secondary break-up activity is set to start when the value of the Weber number (We) of a parcel grows greater than a so-called C bag constant, with the stripping phase of the break-up specifically taking place if Eq.7 is satisfied:…”

Section: Secondary Break-up: the Reitz-diwakar Modelmentioning

confidence: 99%

Combined Experimental and Numerical Investigation of the ECN Spray G under Different Engine-Like Conditions

Paredi¹,

Lucchini²,

D’Errico³

et al. 2018

SAE Technical Paper Series

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A detailed understanding of Gasoline Direct Injection (GDI) techniques applied to spark-ignition (SI) engines is necessary as they allow for many technical advantages such as increased power output, higher fuel efficiency and better cold start performances. Within this context, the extensive validation of multi-dimensional models against experimental data is a fundamental task in order to achieve an accurate reproduction of the physical phenomena characterizing the injected fuel spray. In this work, simulations of different Engine Combustion Network (ECN) Spray G conditions were performed with the Lib-ICE code, which is based on the open source OpenFOAM technology, by using a RANS Eulerian-Lagrangian approach to model the ambient gas-fuel spray interaction. Foremost, the main scope of the activity was to identify the most accurate numerical setup in terms of atomization ad secondary break-up models, thanks to a validation of the computed results against experimental data available for the ECN Spray G baseline condition. Specifically, attention was focused on spray penetration along with an analysis of spray morphology and effects of plume-to-plume interaction. Afterwards, the reference setup was tested and validated under different operating conditions, characterized by detailed experimental measurements specifically provided for this work. In particular, Mie scattering and Schlieren techniques allowed the quasi-simultaneous acquisition of both vapor and liquid penetrations, while a customized imageprocessing procedure, developed in Matlab environment, was used for the outline of the spray contours of both fuel phases to measure the parameters characterizing the jet development. A robust reference numerical setup was identified, capable to reproduce with good accuracy the injection process of a multi-hole GDI spray under the wide range of tested operating conditions. COMBINED EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE ECN SPRAY G

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Section: Secondary Break-up: the Reitz-diwakar Modelmentioning

confidence: 99%