Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Temporal Instability of Charged Conical Liquid Sheet under an Axial Electric Field
Q. F. Fu, X. Liu, L. J. Yang
Abstract:
The atomization process of charged spray are the key factors which affecting the charging efficiency. Therefore, it is of extreme significance to study the atomization model of the charged spray. In order to establish the atomization model, the instability and atomization mechanism is studied. The system is simplified to the conical liquid sheet under an axial electric field. The linear instability analysis is used to get the dispersion relation. We also investigate the effects of different dimensionless parameters on the stability. The results show that the breakup inner radius, the gas-to-liquid density ratio, the Weber Number and the Euler Number in the sinuous mode are all destabilizing factors, while the Euler Number in the varicose mode is the stabilizing factor. In particular, the initial inner radius transforms from the destabilizing factor into the stabilizing factor when it is increasing.
Keywords:
swirl injector, conical liquid sheet, charged spray, stability analysis

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2019.013

In Proceedings Topical Problems of Fluid Mechanics 2019, Prague, 2019 Edited by David Šimurda and Tomáš Bodnár, pp. 89-94 ISBN 978-80-87012-69-7 (Print) ISSN 2336-5781 (Print)