Begell House Inc.
High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
HTM
1093-3611
12
3-4
2008
THERMAL PLASMAS APPLICATIONSReport of the Session held at the International Round Table on Thermal Plasma Fundamentals and ApplicationsHeld in Sharm el Sheikh Egypt - Jan. 14-18 2007
165-203
10.1615/HighTempMatProc.v12.i3-4.10
Pierre
Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France
Thierry
Renault
Laboratory Sciences of Ceramic and Surface Treatment Processes (SPCTS UMR-CNRS 6638) - 123, avenue Albert Thomas 87060 Limoges Cedex - France; Thermadyne Inc. 82 Benning Street, West Lebanon, NH 03784, USA
N.
Hussary
Thermadyne Inc. 82 Benning Street, West Lebanon, NH 03784, USA
A.
Refke
SulzerMetcoAG, Rigackerstr.16, CH-5610 Wohlen
R. H.
Henne
Retired from the Institute of Technical Thermodynamics of the German Aerospace Center (DLR), Stuttgart, Germany
A.
Hacala
EUROPLASMA - 6 rue Lajaunie, 33 100 Bordeaux - France
Chris D.
Chapman
Tetronics, Unit A2, Marston Gate, Off Stirling Road, South Marston Park, Swindon, Wiltshire, SN3 4DE, United Kingdom
David E.
Deegan
Tetronics, Unit A2, Marston Gate, Off Stirling Road, South Marston Park, Swindon, Wiltshire, SN3 4DE, United Kingdom
M.
Harabowsky
Institute of Plasma Physics AS CR - Za Slovancou - P. O. box 17 -182 21 Prague Czech Republic
NANO POWDER SYNTHESIS BY PLASMASReport of the Session held at the International Round Table on Thermal Plasma Fundamentals and ApplicationsHeld in Sharm el Sheikh Egypt - Jan. 14-18 2007
205-254
10.1615/HighTempMatProc.v12.i3-4.20
S.
Siegmann
EMPA-Swiss Federal Institute for Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
Steven L.
Girshick
Department of Mechanical Engineering, University of Minnesota, 111 Church St. S.E. Minneapolis, MN 55455, USA
J.
Szepvolgyi
Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Acad. of Sciences, Budapest, Hungary
M.
Leparoux
EMPA-Swiss Federal Institute for Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
Jong-Won
Shin
EMPA-Swiss Federal Institute for Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
C.
Schreuders
EMPA-Swiss Federal Institute for Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
L.
Rohr
EMPA-Swiss Federal Institute for Materials Science and Technology, Feuerwerkerstrasse 39, CH-3602 Thun, Switzerland
Takamasa
Ishigaki
National Institute for Materials Science, Tsukuba, Japan
J. W.
Jurewicz
CREPE-Energy, Plasma and Electrochemistry Research Centre, Chemical Engineering Department, Faculté de génie, Université de Sherbrooke, Canada
M.
Habib
Laboratoire de biomécanique, Dépt. de génie mécanique, Université de Sherbrooke, Sherbrooke, QC, Canada J1K2R1
Gamal
Baroud
Canada Research Chair in Skeletal Reconstruction and Biomedical Engineering Director, Biomechanics Lab, Université de Sherbrooke, Canada
Francois
Gitzhofer
Plasma Technology Research Centre (CRTP), Department of Chemical Engineering University de Sherbrooke, Sherbrooke (Quebec) CANADA J1K 2R1
M.
Kambara
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1, Bongo, Bunkyo-ku, Tokyo 113-8656, Japan
J. M. A.
Diaz
Department of Materials Engineering, Graduate School of Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
Toyonobu
Yoshida
Department of Materials Engineering, Graduate School of Engineering, The University of Tokyo, 7-3-1, Bongo, Bunkyo-ku, Tokyo 113-8656, Japan
ADVANCED THERMAL PLASMA MODELLING
255-336
10.1615/HighTempMatProc.v12.i3-4.30
Anthony B.
Murphy
CSIRO Manufacturing Flagship, Sydney, Australia
Maher I.
Boulos
Department of Chemical Engineering University of Sherbrooke, 2500 Blvd. de lUniversite Sherbrooke J1К 2R1, PQ - Canada
Vittorio
Colombo
Dipartimento di Ingegneria delle Costruzioni Meccaniche, Nucleari, Aeronautiche e di Metallurgia (D.I.E.M.) and C.I.R.A.M., Università degli Studi di Bologna, Via Saragozza 8, 40123 Bologna, Italy
Pierre
Fauchais
Laboratoire Sciences des Procedes Ceramiques et de Traitements de Surface UMR CNRS 6638 University of Limoges 123 avenue Albert Thomas, 87060 LIMOGES - France
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
Alain
Gleizes
Centre de Physique des Plasmas et de leurs Applications de Toulouse (CPAT) UMR n° 5002 − Université Paul Sabatier, 118 Route de Narbonne F31062 Toulouse Cedex 4 - France
D. C.
Schram
Dept. of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands
Pierre
Proulx
Chemical Engineering department, University of Sherbrooke
The advanced techniques that have been applied to the computational modelling of thermal plasmas in the last ten to fifteen years are reviewed. The techniques considered include three-dimensional and time-dependent models, sophisticated treatments of plasma turbulence and radiative transfer, modelling of demixing and of deviations from thermal and chemical equilibrium, and modelling of multiphase flows, including the interactions between plasmas and solid particles, and plasma-liquid interfaces. Many illustrative examples are presented, and the question of which advanced techniques should be applied in which situation is considered.
WAVELET ANALYSIS OF INSTABILITIES IN A THERMAL PLASMA JET
337-344
10.1615/HighTempMatProc.v12.i3-4.40
J.
Gruber
Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Praha 8, Czech Republic
J.
Hlina
Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Praha 8, Czech Republic
J.
Sonsky
Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Praha 8, Czech Republic
Hydrodynamic processes are mostly responsible for unstable behaviour of thermal plasma jets. Wavelet analysis of CCD camera records of plasma jet radiation can afford valuable results showing the temporal changes of spatial distribution of plasma jet oscillations. The paper presents the basics of the wavelet analysis and some results and conclusions showing possibilities of its applications to the CCD records of plasma jets especially regarding to the selection of a proper wavelet type.
PRE-ARCING TIMES IN HBC FUSE FOR HIGH FAULT CURRENTS. COMPARISON BETWEEN SIMULATION AND EXPERIMENT
345-364
10.1615/HighTempMatProc.v12.i3-4.50
S.
Memiaghe
Laboratoire Arc Electrique et Plasmas Thermiques CNRS FRE 3120, Phys. Bât. 5 - Université Blaise Pascal, Aubière Cedex, France; and P.R.E.S. Clermont Université, Clermont-Ferrand Cedex 1, France
W.
Bussiere
LAEPT CNRS UMR 6069 - Phys. Bat. 5 - Université Blaise Pascal - 24, Avenue des Landais - 63177 Aubiere Cedex - France; and P.R.E.S.Clermont Université, 9 rue Kessler B.P. 10448 63012 Clermont-Ferrand Cedex 1, France
D.
Rochette
Laboratoire Arc Electrique et Plasmas Thermiques CNRS FRE 3120, Phys. Bât. 5 - Université Blaise Pascal, Aubière Cedex, France; and P.R.E.S. Clermont Université, Clermont-Ferrand Cedex 1, France
R.
Touzani
Laboratoire de Mathématiques CNRS UMR 6620, Campus Universitaire des Cézeaux, 24 Avenue des Landais, F63177 Aubière Cedex, France; P.R.E.S.Clermont Université, 9 rue Kessler B.P. 10448 63012 Clermont-Ferrand Cedex 1
P.
Andre
Laboratoire Arc Electrique et Plasmas Thermiques CNRS FRE 3120, Phys. Bât. 5 - Université Blaise Pascal, Aubière Cedex, France; and P.R.E.S. Clermont Université, Clermont-Ferrand Cedex 1, France
This work deals with the calculation of pre-arcing time in the case of High Breaking Capacity fuses submitted to high fault currents. The fuse elements studied consist of silver fuse strips with reduced sections in their centre. During the fuse working the fuse element is fused partly and hence vaporized. The time necessary to obtain an electric arc is called the pre-arcing time. This latter is defined by the duration from the appearance of the fault current to the splitting of the fuse element due to the vaporization of the reduced sections. The mathematic model is based on the solution of the heat transfer Eq., using an enthalpy formulation to take into account the phase transitions, supplemented by an energy source due to the heat produced by ohmic losses. In order to determine the current density evolution in the fuse element, the Laplace Eq. governing the electric potential and the Ohm's law are used. Two typical fuse elements close to industrial ones are chosen for the simulations. The calculated pre-arcing times are given together with the main electrical properties, and compared with the experimental values. The resistive case with cos φ ∼ 0.9 is discussed for a 2.5 mm and 7.5 mm-width elements respectively with one and three reduced sections.