Underwater expansion wave focusing by reflecting at the air interface

K. Ohtani, T. Ogawa

研究成果: Conference contribution

抄録

This paper reports a preliminarily experimental result of high-speed shadowgraph optical visualization of underwater expansion wave focusing by using a simple two-dimensional wedge model for understanding of shock wave interaction phenomena in simulated biomedical materials. Underwater shock wave generated by detonating a micro-explosive (10 mg silver azide pellet) in a small chamber. The generated underwater shock wave was interacted with a wedge shaped interface between water and air divided by a thin film, and an expansion wave was generated by reflection at the interface. The process of underwater expansion wave generation and focusing phenomena was visualized by shadowgraph method and recorded by ultra-high-speed framing camera. Underwater shock wave was reflected as an expansion wave from the interface between water and air at the both side and focused and then cavitation bubble was created by pressure decreasing at the expansion wave focusing area. The pressure histories were measured simultaneously with high-speed optical visualization by a needle type pressure sensor. At the focusing area, the pressure was decreased rapidly, the negative peak pressure was the lowest.

本文言語English
ホスト出版物のタイトルSelected Papers from the 31st International Congress on High-Speed Imaging and Photonics
編集者Takeharu Goji Etoh, Hiroyuki Shiraga, Takeharu Goji Etoh
出版社SPIE
ISBN(電子版)9781510611009
DOI
出版ステータスPublished - 2017 1 1
イベント31st International Congress on High-Speed Imaging and Photonics - Osaka, Japan
継続期間: 2016 11 62016 11 10

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
10328
ISSN(印刷版)0277-786X
ISSN(電子版)1996-756X

Other

Other31st International Congress on High-Speed Imaging and Photonics
CountryJapan
CityOsaka
Period16/11/616/11/10

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

フィンガープリント 「Underwater expansion wave focusing by reflecting at the air interface」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル