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Atomization and Sprays
IF: 1.189 5-Year IF: 1.596 SJR: 0.814 SNIP: 1.18 CiteScore™: 1.6

ISSN Print: 1044-5110
ISSN Online: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v17.i4.10
pages 289-313

ELECTROSTATIC EFFECTS ON GASOLINE DIRECT INJECTION IN ATMOSPHERIC AMBIANCE

Eric K. Anderson
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
Dimitros C. Kyritsis
Department of Mechanical and Industrial Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
Antonio P. Carlucci
Department of Engineering for Innovation, University of Lecce, Italy
Arturo De Risi
Dipartimento di lngegneria dell'Innovazione, Universita di Lecce, Lecce, Italy

ABSTRACT

An experimental investigation of electrostatic effects on gasoline injection from a commercially available injector into atmospheric ambiance is reported. The injector was modified with the addition of an insulated insert that introduced a sharp edge, through which an electric charge was introduced into the fuel. Visualization experiments were performed in order to characterize spray morphology both for electrostatically charged and noncharged sprays. Supported by PDA measurements of droplet size and velocity, these results indicate a faster transition of charged sprays from an initial stage of a narrow, columnlike spray to the desirable, hollow-cone spray. Light Fraunhofer diffraction measurements indicate slow temporal variation of the droplet size during injection and also that charged sprays have a considerably better repeatability of droplet size. These measurements were combined with a measurement of the average induced charge density in order to yield estimates of the electrostatic and inertial forces exerted on the droplets.