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Original Research

FORMATION OF MOLTEN SN AND SN-PB DROPLETS IN MAGNETOHYDRODYNAMIC PUMPS

FARID BAGHERPOOR 1, ALIREZA SADEGHI 2, and KAMBIZ GHAEMI OSGOUIE 3.

Vol 18, No 05 ( 2023 )   |  DOI: 10.17605/OSF.IO/JAKMR   |   Author Affiliation: Kish International Campus, University of Tehran, Kish, Iran 1; School of Mechanical Engineering, College of Engineering, University of Tehran, Tehran, Iran 2; Caspian Faculty of Engineering, University of Tehran, Gilan, Iran 3.   |   Licensing: CC 4.0   |   Pg no: 988-998   |   Published on: 18-05-2023

Abstract

In the present paper, an electromagnetic pump and nozzle are introduced and characterized, preparing an intermittent flow of molten Sn and Sn-Pb. In the designed nozzle, Eddy-currents inside the melt and the alternating electromagnetic forces combine and create a force to produce on-demand droplets. Pulse characteristics, including voltage, duty cycle, and frequency, are altered along with melt characteristics, including alloy composition and temperature. Droplets were produced at 48 conditions, and the shape, weight, and production rate were measured. Results indicate that owing to its higher surface tension; Sn produces larger and heavier droplets than Sn-Pb alloy at all identical test conditions. While the pulse parameters didn't significantly change the droplet weight, their increase resulted in an increasing droplet production rate. The effect of temperature was different at various conditions since it reduces the surface energy and increases electrical resistance and fluidity.


Keywords

Electromagnetic Pump, Drop-On-Demand, Metal Droplet