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Development of a small-sized apparatus for hypervelocity impact experiment in a standard-scale laboratory of one unit

Research Project

Project/Area Number 05555260
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Aerospace engineering
Research InstitutionTokyo Institute of Tcchnology

Principal Investigator

SAWAOKA Akira  Tokyo Institute of Technology Research Laboratory of Engineering Materials, Professor, 工業材料研究所, 教授 (40029468)

Co-Investigator(Kenkyū-buntansha) UEMATSU Kazuo  Ishikawajima-Harima Heavy Industries CO., Ltd., Research Institute, Chief Resear, 技術研究所, 主任研究員
TANABE Yasuhiro  Tokyo Institute of Technology Research Laboratory of Engineering Materials, Asso, 工業材料研究所, 助教授 (70163607)
Project Period (FY) 1993 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1994: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1993: ¥4,200,000 (Direct Cost: ¥4,200,000)
KeywordsLauncher / Two-Stage Light Gas Gun / Helium / Hydrogen / Projectile / Hypervelocity / Micro Launcher / Impact
Research Abstract

Atwo-stage light gas gun is the only launcher which can accelerate a small projectile over 3 km/s with good reproducibility. This launcher needs to be set up in a large-scale laboratory isolated from other facilities because of its safety operation and silence for environment. However a very small-sized two-stage light gas gun, so called a micro gun, could be designed as a luncher to be set up in a standard-scale laboratory of 30 m^2 in floor surface. It was successfully constructed on a base of only 2.8 min length.
This gun was designed to be modified easily in sizes of its launch tube and compression tube which act effectively on projectile acceleration.The launch tube and compression one have the inner diameters of 1.58 mm and 9 mm, respectively for standard operation.One of reasons for this selection is that high-pressure tubes on the market can be used as these tubes.
A magne'to-flyer method was adopted for simple and precise measurement of projectile velocity.A projectile made of ferromagnetic material needs to be prepared for this method.Thus, sphere-shaped projectiles of MnAl alloy with mass density of 5.1 g/cm^3 and diameter of 1mm were made.Each projectile was put in a sabot made of nylon as a flyer in the launch tube.
Acceleration experiments were conducted with respect to some of the parameters as follows ; amount of charge, thickness of a diaphragm set between the launch tube and a high-pressure coupling, weight of a piston for light-gas compression, and weight of a projectile.Experimental results showed that this micro two-stage light gas gun can accelerate a projectile up to 5 km/s by using of safety helium gas, and that this gun was successfully developed.

Report

(3 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 弘中陽一郎: "超小型二段式軽ガス銃の試作" 平成5年度衝撃波シンポジウム講演論文集. 247-250 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 弘中陽一郎: "層構造バンパー板への高速衝突にともなう二次デブリスの直接観察" 平成6年度衝撃波シンポジウム講演論文集. (印刷中). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Youichirou Hironaka: "Development of "Micro" Two Stage Light Gas Gun" Proceedings of "Symposium on SHOCK WAVES,JAPAN'94". 247-250 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] Youichirou Hironaka: "In-situ Observation of Second Debris from Layr-Structure Bampper by a Hyper-velocity Collision" Proceedings of "Symposium on SHOCK WAVES,JAPAN'95". 485-488 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 弘中陽一郎: "超小型二段式軽ガス銃の試作" 平成5年度衝撃波シンポジウム講演論文集. 247-250 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 弘中陽一郎: "層構造バンパー板への高速衝突にともなう二次デブリスの直接観察" 平成6年度衝撃波シンポジウム講演論文集. (印刷中). (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Tamura: "Higher Acceleration Technique of Microprojectiles in a Magnetoplasmadynamic Accelerator" Rev.Sci.Instruments. 64. 724-727 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] 弘中 陽一郎: "超小型二段式軽ガス銃の試作" 平成5年度衝撃波シンポジウム講演論文集. 247-250 (1994)

    • Related Report
      1993 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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