• DocumentCode
    271430
  • Title

    Suppression of Instabilities in Thermal Plasma Jet by Additional Arc Current Modulation

  • Author

    Hlína, Jan ; Gruber, Jan ; Šonský, Jirí

  • Author_Institution
    Inst. of Thermomech., Prague, Czech Republic
  • Volume
    42
  • Issue
    10
  • fYear
    2014
  • fDate
    Oct. 2014
  • Firstpage
    2720
  • Lastpage
    2721
  • Abstract
    Arc current in a dc thermal plasma torch was modulated by superimposed ac current with frequency 15 kHz. The plasma jet optical radiation was recorded by a matrix of fast photodiodes. The analysis of records using standard deviations and 3-D phase portraits has shown that the fluctuations in the plasma jet in the frequency range under 5 kHz were suppressed.
  • Keywords
    arcs (electric); plasma diagnostics; plasma fluctuations; plasma instability; plasma jets; plasma torches; 3D phase portraits; ac current; arc current; arc current modulation; dc thermal plasma torch; frequency 15 kHz; frequency 5 kHz; photodiodes; plasma jet optical radiation; standard deviations; thermal plasma jet; Frequency modulation; Oscillators; Plasmas; Stability analysis; Standards; Thermal stability; Arc current modulation; Fourier transform; phase portrait; plasma torch; stability; stability.;
  • fLanguage
    English
  • Journal_Title
    Plasma Science, IEEE Transactions on
  • Publisher
    ieee
  • ISSN
    0093-3813
  • Type

    jour

  • DOI
    10.1109/TPS.2014.2330740
  • Filename
    6844876
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=271430