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

Autori
Petranović, Zvonimir ; Edelbauer, Wilfried ; Vujanović, Milan ; Duić, Neven

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 25th European Conference on Liquid Atomization and Spray Systems (ILASS-Europe) / Gavaises, M. - , 2013, 841-847

ISBN
978-960-7365-30-9

Skup
25th European Conference on Liquid Atomization and Spray Systems

Mjesto i datum
Khania, Grčka, 01.09.2013. - 04.09.2013

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
CFD; Diesel spray; Eulerian Lagrangian coupling

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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