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

小型标准规模实验室超高速撞击实验装置的研制

• 批准号: 05555260
• 负责人: SAWAOKA Akira
• 金额: $ 3.84万
• 依托单位: Tokyo Institute of Tcchnology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555260/
• 关键词: Launcher; Two-Stage Light Gas Gun; Helium; Hydrogen; Projectile; Hypervelocity; Micro Launcher; Impact

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.

二级轻气炮是目前唯一一种能使小型弹丸加速超过3 km/s、重复性好的发射装置。该发射装置需要安装在与其他设施隔离的大型实验室中，因为它的安全操作和对环境的安静。然而，一个非常小尺寸的两级轻气炮，即所谓的微型炮，可以设计成一个午餐器，安装在地面面积为30平方米的标准规模实验室中。该炮的发射管和压缩管的内径分别为1.58 mm和9 mm，发射管和压缩管的内径分别为1.58 mm和9 mm，发射管和压缩管的内径分别为1.58 mm和9 mm，这种选择的原因之一是市场上的高压管可以用作这些管。飞片法是一种简单而精确的弹丸速度测量方法，该方法需要制备铁磁材料弹丸，质量密度为5.1 g/cm 2的MnAl合金球形射弹3、直径为1 mm，每枚弹丸装在尼龙弹托内作为飞片，在发射管内对部分弹丸进行了加速试验，并对试验结果进行了分析参数如下;试验结果表明，该微型二级轻气炮在安全氦气的作用下，弹丸加速速度可达5 km/s，研制成功。

项目成果

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)

Yoichiro Hironaka：“直接观察分层保险杠板上高速撞击产生的二次碎片”1994 年冲击波研讨会论文集（1995 年出版）。

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)

Yoichiro Hironaka：“超紧凑两级轻气枪原型”1993 年冲击波研讨会论文集 247-250 (1994)。

Youichirou Hironaka: "Development of "Micro" Two Stage Light Gas Gun" Proceedings of "Symposium on SHOCK WAVES,JAPAN'94". 247-250 (1994)

Youichirou Hironaka：““微型”两级轻气枪的开发”“冲击波研讨会，JAPAN94”论文集。

H.Tamura: "Higher Acceleration Technique of Microprojectiles in a Magnetoplasmadynamic Accelerator" Rev.Sci.Instruments. 64. 724-727 (1993)

H.Tamura：“磁等离子动力学加速器中微弹的更高加速技术”Rev.Sci.Instruments。

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)

Youichirou Hironaka：“通过超高速碰撞对来自层状结构 Bampper 的第二碎片进行现场观察”“冲击波研讨会，JAPAN95”论文集。