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ISSN Online: 2688-7231

ISBN Online: 978-1-56700-524-0

Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and Mass Transfer Conference December 17-20, 2021, IIT Madras, Chennai-600036, Tamil Nadu, India
December, 17-20, 2021, IIT Madras, Chennai, India

Computational study on the effect of gas nozzle expansion configurations on the gas flow field for supersonic gas-atomization process

Get access (open in a dialog) DOI: 10.1615/IHMTC-2021.2650
pages 1759-1765

摘要

Metal powders are often produced by the gas-atomization of molten metal. The interaction of the molten metal with high-speed gas causes atomization of molten metal which then solidifies to form the metal powder. In this work, the effect of gas nozzle expansion configuration and gas nozzle offset on the gas flow field at constant mass flow rate and atomization conditions is studied numerically. Four nozzle expansion configurations with three nozzle offsets of length 0, 2, and 4 mm in each case, are considered. Its effect on the aspiration pressure at the melt delivery tube (MDT) tip, supersonic region length along the axis, location of stagnation point, etc. are studied. The simulations indicate that the gas flow field of correctly and under expanded configurations are suitable for the gas-atomization.