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Atomization and Sprays
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ISSN 印刷: 1044-5110
ISSN オンライン: 1936-2684

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Atomization and Sprays

DOI: 10.1615/AtomizSpr.v20.i4.10
pages 269-280

ELECTRICAL AND SPRAY CHARACTERISTICS OF A MULTIORIFICE CHARGE-INJECTION ATOMIZER FOR ELECTRICALLY INSULATING LIQUIDS

Agisilaos Kourmatzis
Aerospace, Mechanical and Mechatronic Engineering
Jeff Allen
Scion Sprays Ltd. Hethel Engineering Centre, Hethel, Norfolk, NR14 8FB
John S. Shrimpton
Energy Technology Research Group, School of Engineering Sciences, University of Southampton, United Kingdom, SO171BJ

要約

Electrostatic atomization of electrically insulating liquids has a number of potential uses with respect to combustion applications and the food processing industry. For charge-injection atomizers that generate well-dispersed spray plumes of this class of liquids, spray-specific charge is inextricably linked to the orifice diameter such that the product of these two variables is approximately constant. This, for a single-orifice atomizer, constrains the maximum flow rate against the mean spray drop diameter for a given pressure drop and spray-specific charge. A relaxation of this requirement is possible using a novel evolution of the high-voltage (HV) emitter electrode surface, permitting an orifice array to be used. This permits high spray charge densities at high flow rates without the precision alignment issues that face charge-injection atomizers that possess a pointed high-voltage electrode. Results show that current-voltage characteristics are very similar to a point-plane system, and both electrical and spray measurements revealed that the multiorifice atomizer is able to provide finely atomized jets even though there is a slight degradation in spray performance when introducing more holes.


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A STUDY OF LIQUID METAL ATOMIZATION USING CLOSE-COUPLED NOZZLES, PART 1: GAS DYNAMIC BEHAVIOR
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