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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F11%3A00367145%21RIV12-AV0-61389021
rdf:type
skos:Concept n14:Vysledek
dcterms:description
Instabilities of thermal plasma jets were studied on the basis of analysis of plasma radiation fluctuations recorded by an array of high frequency photodiodes. Characteristic frequencies of jet oscillations were found and spatial distribution of amplitude of plasma fluctuations was determined. The influence of arc current ripple on plasma instabilities was investigated for two types of power supply - classical thyristor controlled unit with the frequency of the current ripple 300 Hz and the rectifier with the high frequency converter and frequency of the current modulation 30 kHz. Generation of boundary layer instability with the current modulation frequency and its harmonics was proved using fast Fourier transform, contour plots and phase portraits. It was found that the character of fluctuations of plasma jet was substantially influenced by current ripple with the frequency or its harmonics close to the frequency of oscillations generated by boundary layer instability. Instabilities of thermal plasma jets were studied on the basis of analysis of plasma radiation fluctuations recorded by an array of high frequency photodiodes. Characteristic frequencies of jet oscillations were found and spatial distribution of amplitude of plasma fluctuations was determined. The influence of arc current ripple on plasma instabilities was investigated for two types of power supply - classical thyristor controlled unit with the frequency of the current ripple 300 Hz and the rectifier with the high frequency converter and frequency of the current modulation 30 kHz. Generation of boundary layer instability with the current modulation frequency and its harmonics was proved using fast Fourier transform, contour plots and phase portraits. It was found that the character of fluctuations of plasma jet was substantially influenced by current ripple with the frequency or its harmonics close to the frequency of oscillations generated by boundary layer instability.
dcterms:title
Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation
skos:prefLabel
Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation
skos:notation
RIV/61389021:_____/11:00367145!RIV12-AV0-61389021
n14:predkladatel
n15:ico%3A61389021
n3:aktivita
n13:P n13:Z
n3:aktivity
P(GAP205/11/2070), Z(AV0Z20430508)
n3:cisloPeriodika
6
n3:dodaniDat
n12:2012
n3:domaciTvurceVysledku
n18:8418896 n18:5285003
n3:druhVysledku
n9:J
n3:duvernostUdaju
n17:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
226754
n3:idVysledku
RIV/61389021:_____/11:00367145
n3:jazykVysledku
n5:eng
n3:klicovaSlova
dc arc jet; plasma jet oscillations; boundary layer instability; frequency spectra
n3:klicoveSlovo
n6:boundary%20layer%20instability n6:dc%20arc%20jet n6:frequency%20spectra n6:plasma%20jet%20oscillations
n3:kodStatuVydavatele
DE - Spolková republika Německo
n3:kontrolniKodProRIV
[79417ED40451]
n3:nazevZdroje
Plasma Chemistry and Plasma Processing
n3:obor
n19:BL
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
2
n3:projekt
n4:GAP205%2F11%2F2070
n3:rokUplatneniVysledku
n12:2011
n3:svazekPeriodika
31
n3:tvurceVysledku
Hrabovský, Milan Kopecký, Vladimír
n3:wos
000300101200003
n3:zamer
n16:AV0Z20430508
s:issn
0272-4324
s:numberOfPages
12
n10:doi
10.1007/s11090-011-9317-0