University of Tasmania
Browse
Ghiji et al.pdf (526.67 kB)

CFD modelling of primary atomisation of diesel spray

Download (526.67 kB)
conference contribution
posted on 2023-05-23, 09:45 authored by Matt Ghiji, Goldsworthy, L, Vikrambhai GaraniyaVikrambhai Garaniya, Paul BrandnerPaul Brandner, Hield, P
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.

History

Publication title

The Proceedings of the 19th Australasian Fluid Mechanics Conference

Editors

H Chowdhury & F Alam

Pagination

1-4

Department/School

Australian Maritime College

Publisher

RMIT University

Place of publication

Melbourne, Australia

Event title

19th Australasian Fluid Mechanics Conference

Event Venue

Melbourne, Australia

Date of Event (Start Date)

2014-12-08

Date of Event (End Date)

2014-12-11

Rights statement

Copyright 2014 Australasian Fluids Mechanics Society

Repository Status

  • Open

Socio-economic Objectives

Environmentally sustainable transport activities not elsewhere classified

Usage metrics

    University Of Tasmania

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC