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Computational validation of an isentropic plug nozzle design for gas atomisation

Record type: Article

During high pressure gas atomisation (HPGA), the molten metal stream is disintegrated to produce spherical powders when energy is transferred from the gas to the melt. Conventional annular-slit nozzle (ASN) in close-coupled atomisation generates an under-expanded gas jet with characteristic shock waves which consume a great deal of energy through expansion. An isentropic plug nozzle (IPN) is developed in this paper to reduce the shocks and maximize kinetic energy being transferred from the gas to instablize the melt stream. The performance of the IPN is examined using a numerical model which includes gas flow dynamics, droplet break-up mechanism and particle tracking. The numerical results demonstrate a good improvement of gas dynamics and powder yield from the IPN design in comparison with the ASN, in particular when hot gas is employed.

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Citation

Zeoli, N. and Gu, S. (1970) Computational validation of an isentropic plug nozzle design for gas atomisation Computational Materials Science, 42, (2), pp. 245-258. (doi:10.1016/j.commatsci.2007.07.013).

More information

Published date: 1 January 1970
Keywords: CFD, metal powder, gas atomisation, plug nozzle, break-up

Identifiers

Local EPrints ID: 54085
URI: http://eprints.soton.ac.uk/id/eprint/54085
ISSN: 0927-0256
PURE UUID: f3f377e8-f16d-4015-90b6-92f45a69cde4

Catalogue record

Date deposited: 04 Aug 2008
Last modified: 17 Jul 2017 14:36

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Contributors

Author: N. Zeoli
Author: S. Gu

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