Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F11%3A00367145" target="_blank" >RIV/61389021:_____/11:00367145 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11090-011-9317-0" target="_blank" >http://dx.doi.org/10.1007/s11090-011-9317-0</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11090-011-9317-0" target="_blank" >10.1007/s11090-011-9317-0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Resonant Excitation of Boundary Layer Instability of DC Arc Plasma Jet by Current Modulation

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

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Projekt

<a href="/cs/project/GAP205%2F11%2F2070" target="_blank" >GAP205/11/2070: Interakce plazmatu vodní páry s pevnými látkami, plyny a kapalinami při nízkých tlacích a v reaktorech pro plazmové zplynování</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Plasma Chemistry and Plasma Processing

ISSN

0272-4324

e-ISSN

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Svazek periodika

31

Číslo periodika v rámci svazku

6

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

827-838

Kód UT WoS článku

000300101200003

EID výsledku v databázi Scopus

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