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2012 Fiscal Year Final Research Report

Deformation of Shock Wave in Supersonic Plasma Jet Caused by Applied Magnetic Field

Research Project

  • PDF
Project/Area Number 22560174
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Fluid engineering
Research InstitutionTohoku Gakuin University

Principal Investigator

KOIKE Kazuo  東北学院大学, 工学部, 教授 (20108575)

Project Period (FY) 2010 – 2012
Keywords流体工学 / プラズマ / 流体計測 / 衝撃波
Research Abstract

An experimental study of underexpanded plasma jet was carried out to reveal the effects of applied magnetic field on flow behavior around the normal shock wave, that is, Mach disk. Photographic images of the flow were taken with a digital single-lens reflex camera. The light intensity is extracted from uncompressed RAW files of the images. Angles of barrel and reflected shock wave to the flow direction at the reflected shock starting point were determined from the gradient of the light intensity. The angle of reflected shock wave increases with magnetic field intensity. On the other hand, the angle of barrel shock wave tends to decrease with increases in the field strength. Contour plots of the light intensity in downstream region from Mach disk significantly changes with applied magnetic field compared to those without the field. The effects of magnetic field on oblique shock wave around a conical probe in supersonic region of the jet were also studied using the light intensity . The local Mach number in the jet, evaluated from the oblique shock angle using Taylor-Maccoll equation, shows a tendency to increase with the field strength.

  • Research Products

    (8 results)

All 2013 2012 2011

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (6 results)

  • [Journal Article] Image Analysis of an Oblique Shock Wave around a Conical Probe in Plasma Jet under Applied Magnetic Field2012

    • Author(s)
      Noriaki ITAMIYA, Hiroshi SHINDO, Norifumi ONO and Kazuo KOIKE
    • Journal Title

      Frontier of Applied Plasma Technology

      Volume: Vol. 5, NO.2 Pages: 55-60

    • Peer Reviewed
  • [Journal Article] Image Analysis of Shock Wave around a Circular Cone in Plasma Jet under Applied Magnetic Field2011

    • Author(s)
      Noriaki Itamiya, Hiroshi Shindo, Norifumi Ono and Kazuo Koike
    • Journal Title

      ADVANCES IN APPLIED PLASMA SCIENCE

      Volume: 8 Pages: 35-38

    • Peer Reviewed
  • [Presentation] Measurement on Local Mach Number in Plasma Jet under Magnetic Field Using a Conical Probe2013

    • Author(s)
      Noriaki ITAMIYA, Hiroshi SHINDO, Norifumi ONO and Kazuo KOIKE
    • Organizer
      19thAnnual Meeting of IAPS/International Workshop
    • Place of Presentation
      Taipei
    • Year and Date
      2013-03-10
  • [Presentation] Effects of Applied Magnetic Field on Light Intensity Distribution around Mach Disk in Plasma Jet2013

    • Author(s)
      Kazuo KOIKE and Norifumi ONO
    • Organizer
      20thAnnual Meeting of IAPS/International Workshop
    • Place of Presentation
      Kuala Lumpur, Malaysia
    • Year and Date
      2013-03-08
  • [Presentation] 磁場下におけるプラズマ噴流内斜め衝撃波の画像診断2011

    • Author(s)
      天田裕久、小野憲文、小池和雄
    • Organizer
      可視化情報学会全国講演会
    • Place of Presentation
      富山
    • Year and Date
      2011-09-26
  • [Presentation] Emission Spectroscopic Measurement near Plasma Jet Fringe2011

    • Author(s)
      Hiroshi SHINDO, Noriaki ITAMIYA, Norifumi ONO and Kazuo KOIKE
    • Organizer
      18thAnnual Meeting ofIAPS/International Workshop
    • Place of Presentation
      Melbourne
    • Year and Date
      2011-03-12
  • [Presentation] Flow around Mach Disk in Under-Expanded Plasma Jet under Applied Magnetic Field2011

    • Author(s)
      Noriaki ITAMIYA, Hiroshi SHINDO, Norifumi ONO and Kazuo KOIKE
    • Organizer
      18thAnnual Meeting of IAPS/International Workshop
    • Place of Presentation
      Melbourne
    • Year and Date
      2011-03-12
  • [Presentation] 磁場下の超音速プラズマ流中の円錐周りの衝撃波計測2011

    • Author(s)
      石川俊、加藤美奈、川名秀哉、板宮 紀暁、小池和雄
    • Organizer
      日本機械学会東北学生会第41回卒業研究発表講演会
    • Year and Date
      2011-03-03

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Published: 2014-08-29  

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