A model for fuel spray penetration

Sazhin, Sergei, Feng, G. and Heikal, Morgan (2001) A model for fuel spray penetration Fuel, 80 (15). pp. 2171-2180. ISSN 0016-2361

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A new model for fuel spray penetration (location of spray tip) is suggested and validated against available experimental data. Simple analytical expressions for fuel spray penetration are derived in two limiting cases: the initial stage and the two-phase flow regime. At the initial stage, the effects of droplet drag and entrainment of air are accounted for. In the case of the two-phase flow, it is assumed that the spray droplets have the same velocities as the entrained air. The characteristic time of droplet break-up in the spray is estimated for both bag and stripping break-up mechanisms. For realistic diesel spray parameters, the droplet break-up takes place almost immediately after the droplets leave the nozzle. This leads to a considerable shortening of the initial stage and a rapid conversion of the flow to the two-phase stage. This allows the analysis to be restricted to the two-phase flow approximation for this type of spray. The expressions for spray penetration derived in this paper give more accurate predictions compared with those suggested earlier.

Item Type: Journal article
Uncontrolled Keywords: Fuel spray; Diesel engines; Two-phase flow; Droplet break-up
Subjects: H000 Engineering > H300 Mechanical Engineering > H330 Automotive Engineering
DOI (a stable link to the resource): 10.1016/S0016-2361(01)00098-9
Faculties: Faculty of Science and Engineering > School of Computing, Engineering and Mathematics > Engineering and Product Design Research > Automotive Engineering
Depositing User: editor engineering
Date Deposited: 18 Mar 2008
Last Modified: 20 Mar 2015 11:54
URI: http://eprints.brighton.ac.uk/id/eprint/1452

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