Enhancement and validation of an Eulerian-Eulerian approach for Diesel Sprays (CROSBI ID 546198)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Vujanović, Milan ; Edelbauer, Wilfried ; Von Berg, Eberhard ; Tatschl, Reinhard ; Duić, Neven
engleski
Enhancement and validation of an Eulerian-Eulerian approach for Diesel Sprays
Turbulent sprays in computational fluid dynamics calculations (CFD) of internal combustion engines are usually modelled based on the most commonly used Eulerian-Lagrangian method, also known as the Discrete Droplet Model (DDM). This method is especially suitable for the modelling of dilute sprays, but has some disadvantages near nozzle region with respect to insufficient description of the physics in a dense spray, where the bulk liquid phase disintegrates into droplets. This can be improved by stronger physical coupling of the gas and the liquid phase in the near nozzle region using an Eulerian-Eulerian multiphase method. This method provides a more accurate description of the physics in the dense spray region by treating each droplet size class as completely separate phase and solving conservation equations for each of them. The focus of this paper is therefore on the application and validation of the Eulerian-Eulerian spray model. In the standard approach the model deals with fixed droplet size classes, while in an advanced model approach variable size classes are applied. The work presented below on diesel sprays establishes a validated modelling concept that can be applied with confidence for accurate calculation of the dense liquid spray. Several simulations of high pressures diesel injections have been carried out, using AVL’ s CFD code FIRE, and compared with experimental data.
CFD; Diesel spray; Eulerian-Eulerian model
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Podaci o prilogu
2008.
objavljeno
Podaci o matičnoj publikaciji
CD Proceedings of 22nd European Conference on Liquid Atomization and Spray Systems ILASS 2008, Como Lake, Italija
Podaci o skupu
22nd European Conference on Liquid Atomization and Spray Systems ILASS 2008
predavanje
08.09.2008-10.09.2008
Como, Italija