Journal
INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW
Volume 59, Issue -, Pages 1-9Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.ijheatfluidflow.2016.01.005
Keywords
Diesel nozzle; Cavitation; Spray and atomization; Large eddy simulation
Categories
Funding
- China postdoctoral fund projects [2013M530236]
- projects of Six talent peak [2014-ZBZZ-014]
- Research start-up found projects of Jiangsu university [13JDG104]
- Graduate student innovation fund project of Jiangsu province [SJLX_0464]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [PAPD]
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A special spray model is applied to study the spray behavior with high injection pressure and micro-hole nozzle. To reveal the cavitation in diesel nozzle and its influence on spray and atomization, the Large Eddy Simulation (LES) turbulence model is adopted to detect the cavitation, and then the special spray model coupling the cavitation is build. From research results, three important conclusions can be drawn. Firstly, the cavitation flow can raise the effective velocity at the nozzle exit and such effect become even more obvious with higher injection pressure, e.g.180 MPa. Secondly, the applied spray model is in good agreement with the spray characteristics and images obtained from the EFS8400 spray test platform. Thirdly, the cavitation with high injection pressure and micro-hole nozzle can increase the spray cone angle and reduce the spray penetration; the cavitation intensity has a great impact on the spray velocity field and vorticity intensity, especially at the initial spray field under the condition of high injection pressure. (C) 2016 Elsevier Inc. All rights reserved.
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