NDLI: Production of coherent oscillations in thermal plasma jet generated in water stabilized torch

Content Provider	IEEE Xplore Digital Library
Author	Hrabovsky, M. Kopecky, V. Macura, P.
Copyright Year	2000
Description	Author affiliation: Inst. of Plasma Phys., Prague, Czech Republic (Hrabovsky, M.)
Abstract	Summary form only given. A water plasma torch with an anode positioned downstream of the torch exit was used for the generation of an oxygen/hydrogen thermal plasma jet with extremely high plasma temperature and velocity. Fluctuations in the jet were observed using a linear array of photo-diodes. Coherent oscillations with narrow frequency spectrum were observed in the region of interaction of the plasma jet with an secondary anode jet which is created at the point of arc current passage into the electrode. The dependence of amplitude and frequency of oscillations on parameters of the plasma jet and on position of the anode was determined. The coherent oscillations observed in the plasma are probably related to the production of vortex structures due to interaction of flowing plasma in the mainjet with the anode jet. Besides the production of coherent oscillations the formation of new anode attachment by the downstream restrike is a source of perturbation similar to shock wave. The velocity of propagation of the perturbations through the plasma jet in both directions from the point of restrike was determined from the delay of signals of the diodes.
File Size	84438
File Format	PDF
ISBN	0780359828
ISSN	07309244
DOI	10.1109/PLASMA.2000.854732
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-04
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Production Plasma temperature Anodes Plasma sources Plasma waves Frequency Hydrogen Fluctuations Electrodes Shock waves
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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