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<p>To enhance the launch velocity of projectiles in a two-stage light gas gun, an experimental investigation was conducted utilizing a 57/12.7&#xa0;mm hydrogen detonation gun as the test platform. This study is the first attempt to implement a combustion model for a two-stage light gas gun (2SLGG),encompassing gas flow and projectile rigid body motion models. Piston mass serves as a representative parameter in optimization studies. The influence of varying piston masses on the projectile launch velocity was then analyzed using this model. The results indicated that when the piston mass is small, it decelerates prematurely, resulting in a low energy conversion efficiency. Conversely, as the piston mass increases, its high kinetic energy continuously compresses the light gas, maintaining high breech pressure. However, excessively large piston masses result in significant energy losses during piston motion, negatively impacting the projectile velocity. Therefore, for a given hydrogen detonation gun, an optimal piston mass exists. This study provides a theoretical foundation for improving the launch performance of two-stage light gas guns by adjusting the parameter and for refining the test parameter design and enhancing the launch performance of hydrogen detonation guns.</p>

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Influence of Piston Mass on Hydrogen Detonation Two-Stage Light Gas Guns

  • 期刊论文

  • 发表日期：

    2025年5月21日

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  • Lixin Yin,
  • Bingwen Qian,
  • Huakang Li,
  • Chunlin Chen,
  • Kun Ma,
  • Pengfei Gao,
  • Jin Cao,
  • Jincheng Yang

摘要

To enhance the launch velocity of projectiles in a two-stage light gas gun, an experimental investigation was conducted utilizing a 57/12.7 mm hydrogen detonation gun as the test platform. This study is the first attempt to implement a combustion model for a two-stage light gas gun (2SLGG),encompassing gas flow and projectile rigid body motion models. Piston mass serves as a representative parameter in optimization studies. The influence of varying piston masses on the projectile launch velocity was then analyzed using this model. The results indicated that when the piston mass is small, it decelerates prematurely, resulting in a low energy conversion efficiency. Conversely, as the piston mass increases, its high kinetic energy continuously compresses the light gas, maintaining high breech pressure. However, excessively large piston masses result in significant energy losses during piston motion, negatively impacting the projectile velocity. Therefore, for a given hydrogen detonation gun, an optimal piston mass exists. This study provides a theoretical foundation for improving the launch performance of two-stage light gas guns by adjusting the parameter and for refining the test parameter design and enhancing the launch performance of hydrogen detonation guns.