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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
SJR: 0.137 SNIP: 0.341 CiteScore™: 0.43

ISSN Печать: 1093-3611
ISSN Онлайн: 1940-4360

Выпуски:
Том 23, 2019 Том 22, 2018 Том 21, 2017 Том 20, 2016 Том 19, 2015 Том 18, 2014 Том 17, 2013 Том 16, 2012 Том 15, 2011 Том 14, 2010 Том 13, 2009 Том 12, 2008 Том 11, 2007 Том 10, 2006 Том 9, 2005 Том 8, 2004 Том 7, 2003 Том 6, 2002 Том 5, 2001 Том 4, 2000 Том 3, 1999 Том 2, 1998 Том 1, 1997

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v11.i2.110
pages 283-296

3-D MODELING OF ICP TORCHES

Vittorio Colombo
Università degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna, Italy
Emanuele Ghedini
Università degli Studi di Bologna, Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Via Saragozza 8, 40123 Bologna

Краткое описание

A three-dimensional model for the simulation of inductively coupled plasma torches (ICPTs) working at atmospheric pressure has been developed, using customized CFD commercial code FLUENT© . The helicoidal coil is taken into account in its actual 3-D shape, showing its effects on the plasma discharge for various geometric, electric and operating conditions. The electromagnetic equations are solved in their vector potential form, while the steady flow and energy equations are solved for optically thin plasmas under the assumptions of LTE and laminar flow; some of the results that will be presented have been obtained by means of an improved turbulent version of the 3-D model. Simulations are performed over a network cluster of double processor calculators in order to use the full capabilities of the 3-D modelling to describe the gas injection section of an industrial TEKNA PL-35 plasma torch without geometry simplifications, in order to perform a more realistic simulation of the inlet region of the discharge. In order to evaluate the importance of various 3-D effects on calculated plasma temperature and flow fields, our new results have been tested against the ones obtainable from 2-D models and from improved 2-D model that includes 3-D coil effects. Three-dimensional results concerning different operating conditions are presented, together with simulations of the trajectory and heating history of powders injected in the torch through a carrier gas.


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