Experimental Investigation of the Phenomenology of AC-Driven Ethanol Electrosprays
Publication: Journal of Energy Engineering
Volume 146, Issue 6
Abstract
Ethanol alternating current (AC)-manipulated electrosprays were investigated for a frequency range of ; applied RMS voltages 3, 4, 5, and 6 kV RMS; and flowrates 5, 10, 15, 20, and with the purpose of determining spray phenomenology as well as the differences with DC-manipulated e-sprays. Five dominant modes were observed, dripping, cone-jet, multijet, ramified-jet, and spindle mode, of which the ramified jet is specific to AC manipulation. The AC electrosprays demonstrated pulsating spray behavior, with hopping between modes for some cases. The conditions under which each mode appeared were determined in terms of electric bond matter and nondimensional flow rate. It was also shown that the frequency of the applied AC field could couple with the ohmic charge relaxation time in the liquid, as well as with the ionic charge injection time in a way that determined the cycling frequency of the electrosprays.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The authors would like to gratefully acknowledge the support of the Abu Dhabi Department of Education and Knowledge (ADEK) through grant AARE17-087.
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Published In
Journal of Energy Engineering
Volume 146 • Issue 6 • December 2020
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Jun 2, 2020
Accepted: Jul 16, 2020
Published online: Sep 18, 2020
Published in print: Dec 1, 2020
Discussion open until: Feb 18, 2021
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