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Energies 2018, 11(3), 643; https://doi.org/10.3390/en11030643

Development and Validation of 3D-CFD Injection and Combustion Models for Dual Fuel Combustion in Diesel Ignited Large Gas Engines

1
Large Engines Competence Center, 8010 Graz, Austria
2
Faculty of Mechanical Engineering and Naval Architecture, University of Zagreb, 10002 Zagreb, Croatia
3
AVL List GmbH, Graz 8020, Austria
4
Institute of Internal Combustion Engine and Thermodynamics, Graz University of Technology, 8010 Graz, Austria
*
Author to whom correspondence should be addressed.
Received: 27 February 2018 / Revised: 9 March 2018 / Accepted: 11 March 2018 / Published: 14 March 2018
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Abstract

This paper focuses on improving the 3D-Computational Fluid Dynamics (CFD) modeling of diesel ignited gas engines, with an emphasis on injection and combustion modeling. The challenges of modeling are stated and possible solutions are provided. A specific approach for modeling injection is proposed that improves the modeling of the ballistic region of the needle lift. Experimental results from an inert spray chamber are used for model validation. Two-stage ignition methods are described along with improvements in ignition delay modeling of the diesel ignited gas engine. The improved models are used in the Extended Coherent Flame Model with the 3 Zones approach (ECFM-3Z). The predictive capability of the models is investigated using data from single cylinder engine (SCE) tests conducted at the Large Engines Competence Center (LEC). The results are discussed and further steps for development are identified. View Full-Text
Keywords: dual fuel combustion; 3D-CFD modeling; ECFM-3Z; diesel ignited gas engine; ignition delay modeling; experimental validation dual fuel combustion; 3D-CFD modeling; ECFM-3Z; diesel ignited gas engine; ignition delay modeling; experimental validation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Eder, L.; Ban, M.; Pirker, G.; Vujanovic, M.; Priesching, P.; Wimmer, A. Development and Validation of 3D-CFD Injection and Combustion Models for Dual Fuel Combustion in Diesel Ignited Large Gas Engines. Energies 2018, 11, 643.

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