Numerical simulations of a diesel spray by using the Euler Eulerian multi-fluid approach (CROSBI ID 660272)
Prilog sa skupa u zborniku | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Pađen, Ivan ; Vujanović, Milan ; Petranović, Zvonimir ; Cerinski, Damijan
engleski
Numerical simulations of a diesel spray by using the Euler Eulerian multi-fluid approach
In this research, atomization of liquid fuel is analysed using the computational fluid dynamics software AVL FIRE™. In internal combustion diesel engines, the high-velocity liquid fuel is injected into the combustion chamber through a small diameter nozzle. As a result, the turbulent and aerodynamic forces act upon the fuel jet surface, leading to the jet atomization. The atomization process is modelled by utilising the Euler Eulerian multi- fluid approach where both the liquid and the gaseous phases are considered as a continuum. Additionally, the liquid phase is separated into a finite number of droplet classes defined by the droplet diameter. Taking into account that the experimental investigation of the optically dense spray region is highly complex, the simulation results were compared to the available Direct Numerical Simulations (DNS) results. The axial and radial mixture volume fraction were compared, and the model coefficients have been chosen accordingly. The mesh dependency and sensitivity analyses were performed to evaluate the influence of mesh topology, time discretisation, model parameters, number of classes, and diameter of classes on the output data. Furthermore, the influence of the primary breakup process on the entire spray region was investigated by conducting non-reactive spray simulations. The spray characteristics, including the spray tip penetration, droplet frequency distributions, spray cone angle, and Sauter Mean Diameter (SMD) were analysed. Obtained results were compared to the available experimental data, and a good comparison was observed.
CFD ; Modelling ; Spray ; Primary atomization
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Podaci o prilogu
1-21.
2018.
objavljeno
Podaci o matičnoj publikaciji
Digital Proceedings of the 1st Latin American Conference on Sustainable Development of Energy, Water and Environment Systems
Ban, Marko [et al.]
Zagreb: SDEWES
Podaci o skupu
1st Latin American Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES)
predavanje
28.01.2018-31.01.2018
Rio de Janeiro, Brazil