Development of a Large Diameter Diaphragmless Shock Tube for Use in Gas-Dynamic Laser Experiments

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  • Rego I. da S.
    Department of Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • 三好 由哲
    九州大学総合理工学府先端エネルギー工学専攻
  • 安藤 赳虎
    九州大学総合理工学府先端エネルギー工学専攻
  • 後藤 賢太郎
    九州大学総合理工学府先端エネルギー工学専攻
  • 三角 和也
    Department of Advanced Energy Engineering Science, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University
  • 宮崎 俊昌
    九州大学総合理工学府先端エネルギー工学専攻
  • 西依 祥平
    九州大学総合理工学府先端エネルギー工学専攻
  • 佐藤 浩之助
    九州大学応用力学研究所
  • 坂本 瑞樹
    九州大学応用力学研究所
  • 川崎 昌二
    九州大学応用力学研究所
  • TRIAM Team
    Research Institute for Applied Mechanics, Kyushu University

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抄録

A large diameter diaphragmless shock tube designed to drive gas-dynamic laser (GDL) experiments has been newly developed. A diaphragmless structure is used in place of a rupturing diaphragm from which normal shock waves are formed. The details of engineering design are described and the role of such a structure in generating repeatable shock waves is discussed. Improvements in the diaphragmless structure, which have ensured consistent and reliable operation, are discussed as well. The experimental GDL device driven by this shock tube is introduced. Characteristics of incident and reflected shock waves propagating in the diaphragmless shock tube and its performance are experimentally investigated. Variations of laser output power and energy with incident-shock Mach number in a 0.3 CO2 + 0.7 N2 mixture are preliminarily reported.

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