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Plasma Flow Structure of Direct-Current Arcjet Thrusters and Its Spacecraft Interaction Research

Research Project

Project/Area Number 13450398
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Aerospace engineering
Research InstitutionOsaka University

Principal Investigator

TAHARA Hirokazu  Osaka University, Graduate School of Engineering Science, Associate Professor, 大学院・基礎工学研究科, 助教授 (20207210)

Co-Investigator(Kenkyū-buntansha) ONOE Ken-ichi  Osaka University, Graduate School of Engineering Science, Assistant Professor, 大学院・基礎工学研究科, 助手 (70029429)
YOSHIKAWA Takao  Osaka University, Graduate School of Engineering Science, Professor, 大学院・基礎工学研究科, 教授 (00029498)
安井 利明  大阪大学, 大学院・基礎工学研究科, 助手 (10263229)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥13,200,000 (Direct Cost: ¥13,200,000)
Fiscal Year 2002: ¥3,900,000 (Direct Cost: ¥3,900,000)
Fiscal Year 2001: ¥9,300,000 (Direct Cost: ¥9,300,000)
KeywordsArcjet Thruster / Space Propulsion / Electric Propulsion / Plasma Flow / Plasma Environment / Spacecraft Environment / Contamination / Plasma Diagnostics / プラズマプリューム / 直流放電 / 噴出流 / プラズマ・宇宙機干渉
Research Abstract

Spectroscopic and electrostatic probe measurements were made to examine plasma characteristics with or without a titanium plate for a 10-kW-class direct-current arcjet thruster. Heat fluxes into the plate from the plasma were also evaluated with a Nickel slug and thermocouple arrangement. Ammonia and mixtures of nitrogen and hydrogen were used as a working gas. The NH_3 and N\2+3H_2 plasmas in the nozzle and in the downstream plume without a substrate plate were in thermodynamical nonequilibrium states. As a result, the H-atom electronic excitation temperature and the N_2 molecule-rotational excitation temperature intensively decreased downstream in the nozzle although the NH molecule-rotational excitation temperature did not show an axial decrease. Each temperature was kept in a small range in the plume without a substrate plate except for the NH rotational temperature for NH_3 working gas. On the other hand, as approaching the titanium plate, the thermodynamical nonequilibrium plasma came to be a temperature-equilibrium one because the plasma flow tended to stagnate in front of the plate. The electron temperature had a small radial variation near the plate. Both the electron number density and the heat flux decreased radially outward, and an increase in H_2 mole fraction raised them at a constant radial position. In cases with NH_3 and N_2+3H_2, a radical of NH with a radially wide distribution was considered to contribute to the better nitriding as a chemically active and non heating process.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] Hirokazu Tahara et al.: "Near Substrate Plasma Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jet for Nitriding under a Low Pressure Environment"Proc. 15th Int. Symp. Plasma Chemistry. 1. 205-210 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tsuji Shibata et al.: "Plasma Flow Characteristics of Electromagnetic Acceleration Plasma Jet Generator for Titanium-Nitride Reactive Spray Coatings"Proc. 15th Int. Symp. Plasma Chemistry. 6. 2219-2224 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma Plume Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jet for Nitriding under a Low Pressure Environment"Advances in Applied Plasma Science. 3. 35-40 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Exhaust Plume Characteristics of Quasr Steady MPD Thrusters"27th Int. Electric Propulsion Conf. 1. 1-9 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 白崎 篤司 他: "基板に衝突する希薄流のモンテカルロシミュレーション"プラズマ応用科学. 9. 9-16 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma Characteristics of a 10-kw-Class DC Arcjet"Proc. 23rd Int. Symp. Space Tech. and Sci.. 2002-b-35p. 407-412 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Near-Substrate Plasma Characteristics and Relationships between Heat Fluxes of DC Plasma Jet and Them"Proc. Int. Thermal Spray Conf.. 1. 771-776 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma and Heat Flux Characteristics of a Supersonic Ammonia or Nitrogen/Hydrogen-Mixture DC Plasma Jet"IEEE Trans. Plasma Science. 4(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Material Spraying Llsiing Electromagnetically Accelerated Plasma"Japanese Journal of Appl.Phys.. 4(印刷中). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Near-Substrate Plasma Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jet for Nitriding under a Low Pressure Environment"Proc. 15th Int. Symp. Plasma Chemistry. Vol.1. 205-2l0 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] TeTsuji Shibata et al.: "Plasma Flow Characteristics of Electromagnetic Acceleration Plasma Jet Generator for Titanium-Nitride Reactive Spray Coatings"Proc. 15th Int. Symp. Plasma Chemistry. Vol.1. 205-210 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma Plume Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma jet Generator for Nitriding under a Low Pressure Environment"Advances in Appl. Plasma Sci.. Vol.3. 35-40 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Exhaust Plume Characteristics of Quasi-Steady MPD Thrusters"27th Int. Electric Propulsion Conf.. 1-9 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma Characteristics of a 10-kW-Class DC Arcjet"Proc. 23rd Int. Symp. Space Tech. and Sci.. 2002-b-35p. 407-412 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Near-Substrate Plasma Characteristics And Relationships between Heat Fluxes of DC Plasma Jet and Them"Proc. Int. Thermal Spray Conf.. Vol.1. 771-776 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Plasma and Heat Fluxes Characteristics of a Supersonic Ammonia or Nitrogen-Mixture DC Plasma Jet"IEEE Trans. Plasma, Sci.. in press. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Tahara et al.: "Material Spraying Using Electromagnetically Accelerated Plasma"Jpn. J. Appl. Phys.. in press. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hirokazu Thahara et al.: "Plasma Characteristics of a 10-KW-Class DC Arcjet"Proc. 23rd Int. Symp. Space Tech. and Sci.. 2002-b-35p. 407-412 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Near-Substrate Plasma Characteristics and Relationships between Heat Fluxes of DC Plasma Jet"Proc. Int. Thermal Spray Conf. (ITSC 2002). Vol.1. 771-776 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Plasma and Heat Flux Characteristics of a Supersonic Ammonia or Nitrogen/Hydrogen-Mixture DC Plasma Jet"IEEE Trans. Plasma Science. 4月号(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Material Spraying Using Electromagnetically Accelerated Plasma"Japanese Journal of Appl. Phys.. 4月号(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Near-Substrate Plasma Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jet for Nitriding under a low Pressure environment"Proc. 15th Int. Symp. Plasma Chemistry. 1. 205-210 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Tetsuji Shibata et al.: "Plasma Flow Characteristics of Electromagnetic Acceleration Plasma Jet Generators for Titanium-Nitride Reactive Spray Coatings"Proc. 15th Int. Symp. Plasma Chemistry. 6. 2219-2224 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Yasutaka Ando et al.: "Study on Nitriding of Aluminium by Supersonic Expanding Nitrogen Plasma Jets"Proc. 15th Int. Symp. Plasma Chemistry. 6. 2511-2514 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Plasma Plume Characteristics of a Supersonic Ammonia and Nitrogen/Hydrogen-Mixture DC Plasma Jet for Nitriding under a low Pressure Environment"Advances in Applied Plasma Science (ISAPS'01). 3. 35-40 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Hirokazu Tahara et al.: "Exhaust Plume Characteristics of Quasi-Steady MPD Thrusters"27th Int. Electric Propulsion Conf.. 1. 1-9 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 白崎篤司 他: "基板に衝突する希薄流のモンテカルロシミュレーション"プラズマ応用科学. 9. 9-16 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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