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CFD modelling of primary atomisation of diesel spray
Citation
Ghiji, M and Goldsworthy, L and Garaniya, V and Brandner, PA and Hield, P, CFD modelling of primary atomisation of diesel spray, The Proceedings of the 19th Australasian Fluid Mechanics Conference, 8-11 December, Melbourne, Australia, pp. 1-4. (2014) [Refereed Conference Paper]
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Copyright Statement
Copyright 2014 Australasian Fluids Mechanics Society
Official URL: http://afms.org.au/proceedings.html#proceedings
Abstract
Primary atomisation in a high-pressure diesel jet is modelled
using Large Eddy Simulation. The Volume Of Fluid phasefraction
based interface capturing technique was applied in the
Eulerian framework using the open source CFD code
OpenFOAM. Conditions modelled replicate those of a parallel
experimental program including nozzle inlet pressure change,
spray chamber pressure (ambient zone) and temperature and
viscosity of both phases. The nozzle geometry was obtained
using X-ray Computed Aided Tomography. Diesel fuel pressure
at sac inlet was defined based on injection pressure profile
(ranging from 30 to 1200 bar) captured during experimental tests.
The effect of different grid sizes with mesh resolutions of 2.5, 8,
and 18 million cells on primary breakup was investigated. The
results assist with understanding the flow behaviour during
primary break up, including commencement of fragmentation
and the early spray cone angle. The results also showed that the
jet break-up increased in meshes with higher resolutions.
Furthermore, investigation of in-nozzle flow indicated a non-axisymmetric
behaviour. The early spray angle of the numerical
results was more than the experimental data, probably due to
cavitation and compressibility not being modelled. These effects
will be studied in forthcoming works.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | CFD, Primary atomisation, Diesel Engine, Injection |
| Research Division: | Engineering |
| Research Group: | Automotive engineering |
| Research Field: | Automotive combustion and fuel engineering |
| Objective Division: | Transport |
| Objective Group: | Environmentally sustainable transport activities |
| Objective Field: | Environmentally sustainable transport activities not elsewhere classified |
| UTAS Author: | Ghiji, M (Dr Matt Ghiji) |
| UTAS Author: | Goldsworthy, L (Dr Laurie Goldsworthy) |
| UTAS Author: | Garaniya, V (Associate Professor Vikram Garaniya) |
| UTAS Author: | Brandner, PA (Professor Paul Brandner) |
| ID Code: | 97810 |
| Year Published: | 2014 |
| Deposited By: | NC Maritime Engineering and Hydrodynamics |
| Deposited On: | 2015-01-14 |
| Last Modified: | 2016-02-29 |
| Downloads: | 141 View Download Statistics |
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