Particle and Aerosol Research Vol. 2, No. 1, March 2006 |
ISSN : 1738-8716 (Print) ISSN : 2287-8130 (Online) |
Characteristics of electrospray using multi-nozzle system
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Abstracts
An experimental investigation was performed on multi-nozzle electrospray that was operated in the cone-jet
mode. The effects of liquid flow rate, applied voltage to the guard plate, and electrospray geometry on droplet size,
droplet velocity, and spray angle were systematically investigated. Operating the electrospray in the cone-jet mode,
charged micro droplets can be obtained in almost uniform size. Thus the cone-jet mode electrospray has been
applied to some interesting fields such as medical powder production, film coating process, electrostatic painting,
etc. We designed an electrospray system with multi-nozzle for overcoming low flow rate of electrospray in the
cone-jet mode. At the standard condition, the cone-jet mode is generated by supplying ethanol at a various liquid
flow rate (5~40 ¥ìL/min) through the syringe pump and applying a high voltage (0~5 kV) to a stainless-steel
capillary tip (0.5 mm i.d., 0.9 mm o.d.). There were no differences in the generated droplet size distribution between
the single- and multi-nozzle electrospray with a guard plate which made the spray angle became smaller. The
droplet velocity increased with the increase of voltage applied to the guard plate.
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