Naslov
Numerical simulations of primary breakup process by using the Euler Eulerian multi-fluid approach

Autori
Petranović, Zvonimir ; Pađen, Ivan ; Cerinski, Damijan ; Vujanović, Milan

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

Izvornik
Digital Proceedings of the 12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES / Ban, Marko [et al.] - Zagreb : Fakultet strojarstva i brodogradnje Sveučilišta u Zagrebu, 2017, 1-1

Skup
12th Conference on Sustainable Development of Energy, Water and Environment Systems - SDEWES 2017

Mjesto i datum
Zagreb, Hrvatska, 04.10.2017. - 08.10.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Liquid fuel ; injection ; Disintegration ; CFD

Sažetak
In this research, atomization of liquid fuel targeting the processes in the near-nozzle region is analysed by 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 turbulence and aerodynamic forces act upon the fuel jet surface, leading to 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 (near the nozzle) is highly complex, the simulation results were compared to the available Direct Numerical Simulations (DNS) results of fuel jet primary breakup process. The axial and radial mixture volume fraction was compared to the DNS studies, and the model coefficients have been chosen accordingly. Mesh dependency test and sensitivity analysis were performed to evaluate the influence of mesh topology, time discretisation, model parameters, number and diameter of classes on output data. Furthermore, the drag influence was modified to investigate the possibility of ligament creation modelling.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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