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Proceedings Paper

Holographic interferometric observation of weak shock waves generated by entrance of a high-speed train into a long tunnel
Author(s): Kazuyoshi Takayama; Akihiro Sasoh; Osamu Onodera; Ji-Ming Yang; Hidenori Ojima; Toshihiro Ogawa; Ryuichi Kaneko; Osamu Matsui
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Paper Abstract

When a high speed train enters a long tunnel, compression waves which were generated in front of the high speed train, coalesce into a weak shock wave and the shock wave eventually is emitted from the tunnel exit as a sonic boom. In order to investigate the tunnel sonic boom a 1/300 scaled tunnel simulator was constructed in which a plastic cylinder slides down along a 8 degree(s) inclined long tube with a speed of 60 to 110 m/s. The high speed cylinder and the steel tube represent the train and the tunnel, respectively. Double exposure holographic interferometric flow visualization was used for clarifying the formation and propagation of weak shock waves in the scale tunnel simulator. For interpretation of behaviors of weak shock waves, a shock tube experiment was also carried out again by using holographic interferometry.

Paper Details

Date Published: 30 May 1995
PDF: 10 pages
Proc. SPIE 2513, 21st International Congress on: High-Speed Photography and Photonics, (30 May 1995); doi: 10.1117/12.209615
Show Author Affiliations
Kazuyoshi Takayama, Tohoku Univ. (Japan)
Akihiro Sasoh, Tohoku Univ. (Japan)
Osamu Onodera, Tohoku Univ. (Japan)
Ji-Ming Yang, Tohoku Univ. (Japan)
Hidenori Ojima, Tohoku Univ. (Japan)
Toshihiro Ogawa, Tohoku Univ. (Japan)
Ryuichi Kaneko, JR East Japan Railway Co. (Japan)
Osamu Matsui, JR East Japan Railway Co. (Japan)


Published in SPIE Proceedings Vol. 2513:
21st International Congress on: High-Speed Photography and Photonics
Ung Kim; Joon-Sung Chang; Seung-Han Park, Editor(s)

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