日本語フィールド
著者：Tokitada Hashimoto, Kensuke Hieda, Yuko Yokoo, Shigeru Matsuo and Toshiaki Setoguchi題名：Experimental Study on High-Speed Particle Induced by a Micro Shock Tube発表情報：Proceedings of 12th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows, ISAIF12_032(USB), July 13-16, 2015, Lerici, Italyキーワード：Micro Shock Tube, Gas-Solid Two-Phase Flow, Nozzle, Supersonic Jet, Flow Visualization概要：抄録：Recently injection system without a needle and pain, which is called needle free injection (NFI), has been investigated all over the world. The method may be useful for not only patients that must use injectors very frequently but also medical staffs. We are interested in a powder injection method that makes use of a shock tube technology. A particle with the order of 10 μm or less is often used. The powder injection is one of the NFI systems, and is the method that transdermally administers powder particles accelerated over the sound speed using the shock tube technology inside human body.
In the present study, a micro shock tube is manufactured with a variable cross-section shock tube and a reflected shock tube as shown in Fig. 1. In order to obtain the characteristic data for the facility, the pressure measurement and the optical visualizations are carried out. The pressure measurements are conducted in the driven section and at the nozzle exit. Moreover, the flight velocity of the powder particles is measured by particle tracking velocimetry (PTV) method from the results of flow visualization using an ultra high-speed video camera with high spatial and temporal resolution. In addition, in order to investigate a suitable position to put a mass of powder particles in the driven section initially, visualization inside the driven section is carried out.英語フィールド
Author：Tokitada Hashimoto, Kensuke Hieda, Yuko Yokoo, Shigeru Matsuo and Toshiaki SetoguchiTitle：Experimental Study on High-Speed Particle Induced by a Micro Shock TubeAnnouncement information:Proceedings of 12th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows, ISAIF12_032(USB), July 13-16, 2015, Lerici, ItalyKeyword：Micro Shock Tube, Gas-Solid Two-Phase Flow, Nozzle, Supersonic Jet, Flow VisualizationAn abstract：Recently injection system without a needle and pain, which is called needle free injection (NFI), has been investigated all over the world. The method may be useful for not only patients that must use injectors very frequently but also medical staffs. We are interested in a powder injection method that makes use of a shock tube technology. A particle with the order of 10 μm or less is often used. The powder injection is one of the NFI systems, and is the method that transdermally administers powder particles accelerated over the sound speed using the shock tube technology inside human body.
In the present study, a micro shock tube is manufactured with a variable cross-section shock tube and a reflected shock tube as shown in Fig. 1. In order to obtain the characteristic data for the facility, the pressure measurement and the optical visualizations are carried out. The pressure measurements are conducted in the driven section and at the nozzle exit. Moreover, the flight velocity of the powder particles is measured by particle tracking velocimetry (PTV) method from the results of flow visualization using an ultra high-speed video camera with high spatial and temporal resolution. In addition, in order to investigate a suitable position to put a mass of powder particles in the driven section initially, visualization inside the driven section is carried out.