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Q1(Year 2015)
ISSN : 1026-3098
e-ISSN : 2345-3605
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Publication Information : Volume 23 - Number 1 - Successive Number 1
Type : Article
Topics of Paper : Transaction on Mechanical Engineering
English Title : Probing into the Effects of Fuel Injection Pressure and Nozzle Hole Diameter on Spray Characteristics under Ultra-high Injection Pressures Using Advanced Breakup Model
English Abstract : In this article, non-evaporating and non-reacting diesel spray is modeled under ultra-high injection pressure using an Eulerian-Lagrangian scheme. This is accomplished in order to probe into the effects of injection pressure, nozzle diameter, and ambient density on spray characteristics. An advanced hybrid breakup model that takes into consideration the transient processes during spray injection has been added to the open source code OpenFOAM. Reynolds-Average Navier-Stokes (RANS) equations are solved using standard  turbulence model and fuel droplet is tracked by a Lagrangian scheme. Published experimental data have been used for validation of spray characteristics at 15 kg/m3 ambient density and injection pressures of 100, 200 and 300MPa. Also, three nozzle diameters of 0.08, 0.12 and 0.16mm have been implemented for investigating the effect of this parameter on spray formation. Computed spray shape, jet penetration, spray volume, equivalent ratio along the injector axis and Sauter Mean Diameter (SMD) illustrate good agreement with experimental data of single hole nozzle and symmetric spray. The effects of fuel injection pressure, nozzle hole diameter and ambient density on main spray parameters are presented. It is concluded that numerical model presented here is quite suitable for accurately predicting diesel spray shapes under ultra-high injection pressures.
English Keywords : Diesel spray; Ultra-high injection pressure; Nozzle hole diameter; Penetration length; Breakup model; OpenFOAM
Refrences :
Number Of Pages :
From 238 to 248


Authors :
The AuthorAuthor SequenceOrganizationOrganization ( english )AffiliationEmailEducation
Mahdi Yousefifard 1Department of Marine Technology, Amirkabir University of Technology, Tehran, Iran    
Dr. Parviz Ghadimi
(Author)
2Department of Marine Technology, Amirkabir University of Technology, Tehran, Iran Assistant Professorpghadimi@aut.ac.ir 
Dr. Seyed Mostafa Mirsalim 3Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran Assistant Professor  
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