每年出版 4 期
ISSN 打印: 1093-3611
ISSN 在线: 1940-4360
IF:
0.4
Immediacy Index:
0.1
Eigenfactor:
0.00005
JCI:
0.07
SJR:
0.198
SNIP:
0.48
CiteScore™::
1.1
H-Index:
20
Indexed in
2-D AND 3-D FLUIDYNAMIC AND PLASMA CHARACTERIZATION OF DC TRANSFERRED ARC PLASMA TORCHES FOR METAL CUTTING
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摘要
The aim of this work is to investigate by means of a 2-D and 3-D FLUENT® based numerical model the behaviour of a transferred arc plasma torch recently developed within Cebora S.p.A. for the cutting of a metallic substrate material. Flow and heat transfer equations are solved with coupled electromagnetic ones, for LTE optically thin plasma, while turbulence phenomena are taken into account by means of a k-ε Realizable model. Simulations include a prediction of the thermal behaviour of the hafnium insert of the cathode and trajectories of hafnium oxide particles emitted from it and the efficiency of nozzle cooling systems in various operating conditions including gas mixtures (O2/Air, H35/N2, Air/Air) fitted for various dimension and type of the cutting material. Results obtained from the simulations are compared with experimental measurements in order to perform a validation of the model in terms of pressure in different regions of the device, gas mass flow rate and nozzle temperature during the processing phase. For this purpose a modified plasma torch has been designed and used with realistic cutting conditions.
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Colombo V., Concetti A., Ghedini E., Dallavalle S., Vancini M., Understanding Plasma Fluid Dynamics Inside Plasma Torches Through Advanced Modeling, IEEE Transactions on Plasma Science, 36, 2, 2008. Crossref
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Colombo V, Concetti A, Ghedini E, Dallavalle S, Design oriented simulation for plasma arc cutting consumables and experimental validation of results, Plasma Sources Science and Technology, 20, 3, 2011. Crossref
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Boselli M, Colombo V, Ghedini E, Gherardi M, Sanibondi P, Two-temperature modelling and optical emission spectroscopy of a constant current plasma arc welding process, Journal of Physics D: Applied Physics, 46, 22, 2013. Crossref
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Trelles Juan Pablo, Modirkhazeni S. Mahnaz, Variational multiscale method for nonequilibrium plasma flows, Computer Methods in Applied Mechanics and Engineering, 282, 2014. Crossref
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Colombo V., Concetti A., Ghedini E., Dallavalle S., Vancini M., Understanding plasma fluid dynamics inside plasma torches through advanced modeling, 2007 16th IEEE International Pulsed Power Conference, 2007. Crossref
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Colombo V., Ghedini E., Dallavalle S., Vancini M., Understanding Plasma Fluid Dynamics Inside Plasma Torches Through Advanced Modeling, 2007 IEEE 34th International Conference on Plasma Science (ICOPS), 2007. Crossref
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Colombo Vittorio, Concetti Alessia, Ghedini Emanuele, Three-Dimensional Design-Oriented Simulation of PAC Torches, IEEE Transactions on Plasma Science, 39, 11, 2011. Crossref
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Boselli M., Colombo V., Ghedini E., Gherardi M., Rotundo F., Sanibondi P., Two-temperature modelling and optical emission spectroscopy of a constant current plasma arc welding process, 2013 19th IEEE Pulsed Power Conference (PPC), 2013. Crossref
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Trelles Juan Pablo, Nonequilibrium Phenomena in (Quasi-)thermal Plasma Flows, Plasma Chemistry and Plasma Processing, 40, 3, 2020. Crossref
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Colombo V., Concetti A., Ghedini E., Rotundo F., Sanibondi P., Boselli M., Dallavalle S., Gherardi M., Nemchinsky V., Vancini M., Advances in Plasma Arc Cutting Technology: The Experimental Part of an Integrated Approach, Plasma Chemistry and Plasma Processing, 32, 3, 2012. Crossref