Validation of Eulerian-Eulerian Approach for Diesel Sprays, and 3D Coupling with Lagrangian Spray Approach

Petranović, Zvonimir and Edelbauer, Wilfried and Vujanović, Milan and Duić, Neven (2013) Validation of Eulerian-Eulerian Approach for Diesel Sprays, and 3D Coupling with Lagrangian Spray Approach. = Validation of Eulerian-Eulerian Approach for Diesel Sprays, and 3D Coupling with Lagrangian Spray Approach. In: 25th European Conference on Liquid Atomization and Spray Systems, 01.-04.09.2013., Chania, Kreta.

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Official URL: http://bib.irb.hr/prikazi-rad?rad=712177

Abstract

Spray process in Computational Fluid Dynamics (CFD) calculations is usually modelled by use of the wide spread Eulerian-Lagrangian multiphase method. Model for spray calculations based on this method is called Discrete Droplet Model (DDM), which is suitable for calculations of dilute spray in the region far away from the nozzle, but it has disadvantages for calculations in the near nozzle region. This region is also known as dense spray region where liquid phase occupies around 90 % of the entire cell volume. Drawback mentioned before is the result of a weak physical coupling between the gaseous and the liquid phase. Hence, the assumption of a single droplet surrounded by a gas field is not reasonable in a dense spray region. Use of the Eulerian-Eulerain multiphase model is one way how this can be avoided. This model divides the liquid phase into several phases with corresponding diameters and volume fractions. For such phase definition a model solves conservation equations and this result in better physical coupling of the mentioned phases. In this paper validation of the Eulerian-Eulerian spray model was done by running calculations of high pressure Diesel fuel injection into combustion chamber. Afterwards, the Eulerian-Eulerian model was used in combination with DDM model in real-case engine simulations. These two approaches were coupled by use of the AVL’s Code Coupling Interface (ACCI). This procedure will be described inside section mathematical modelling. Fuel injection simulations were performed with commercial AVL’s CFD code FIRE. The results shows penetration comparison of vaporized and liquid fuel, as also pressure and temperature curves in real-case engine simulations.

Item Type: Conference or Workshop Item (Lecture)
Keywords (Croatian): CFD, Diesel spray, Eulerian Lagrangian coupling
Subjects: TECHNICAL SCIENCE > Mechanical Engineering
Divisions: 500 Department of Energy, Power Engineering and Environment > 510 Power Engineering and Energy Management Chair
Indexed in Web of Science: No
Indexed in Current Contents: No
Date Deposited: 07 Apr 2016 09:41
Last Modified: 25 Apr 2016 15:26
URI: http://repozitorij.fsb.hr/id/eprint/5474

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