High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) An International Journal

ISSN for PRINT: 1093-3611

For Online Access

Best Paper Award Selection - Editorial Board Site

2004, Volume8

Issue 2

168 pages

DOI: 10.1615/HighTempMatProc.v8.i2

Issue price - $144.00

J. Hlina
Institute of Electrical Engineering, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 02 Praha 8, Czech Republic

J. Sonsky
Institute of Electrical Engineering, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 02 Praha 8, Czech Republic

V. Nenicka
Institute of Electrical Engineering, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 02 Praha 8, Czech Republic

CCD camera with the imaging frequency 8000 fps was used for recording optical radiation of a thermal plasma jet. The fast Fourier transform of the recorded matrices representing the evolution of plasma jet radiation intensity was used to acquire frequency spectra for each pixel of the CCD chip. Spatial distributions of amplitudes at significant frequencies reflected by peaks in frequency spectra and corresponding to various types of oscillations were then evaluated. The results show that some types of oscillations are generated mainly on the jet boundaries or tail and their relative intensities may be sometimes distributed strongly asymmetrically, while the amplitudes corresponding to the plasma jet modulation introduced by the ripple of the arc current show distributions with several maxima at distinct plasma jet regions.

DOI: 10.1615/HighTempMatProc.v8.i2.60 Download article, 215-220 pages

Article price - $35.00

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