Combustion wave propagation and detonation initiation in the vicinity of closed-tube end walls

Jun Yageta, Satoshi Shimada, Ken Matsuoka, Jiro Kasahara, Akiko Matsuo

研究成果: Article

8 引用 (Scopus)

抄録

There are not many studies on DDT with no obstacles and the initiation of DDT near the end of a closed tube. Therefore in the present study we experimentally investigate the mechanism of the combustion wave transition to a detonation wave when there are no obstacles. In particular, we show that a local explosion near the tube wall is necessary for the initiation of a detonation. Parameters that we varied are the wall configuration, distance between the ignition point and the wall, and initial filling pressure. The combustion waves and the compression waves are visualized using the Schlieren optical system. From the results, we found it is necessary for the combustion wave to reach four walls so that the detonation could be initiated by the local explosion. In the conditions of the present experiment, we exhibited that the local explosion did not occur in the vicinity of a single wall and four orthogonal walls; instead, the local explosion occurred in a situation with five orthogonal walls. The time of the local explosion and the detonation initiation is 2.6 ± 1.1 and 2.0 ± 0.1 times the characteristic time for the combustion wave to propagate hemispherically from an ignitor and reach the four walls.

元の言語English
ページ(範囲)2303-2310
ページ数8
ジャーナルProceedings of the Combustion Institute
33
発行部数2
DOI
出版物ステータスPublished - 2011

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flame propagation
Detonation
detonation
Wave propagation
wave propagation
Explosions
tubes
explosions
DDT
compression waves
Optical systems
detonation waves
Ignition
Compaction
ignition
configurations
Experiments

ASJC Scopus subject areas

  • Mechanical Engineering
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

これを引用

Combustion wave propagation and detonation initiation in the vicinity of closed-tube end walls. / Yageta, Jun; Shimada, Satoshi; Matsuoka, Ken; Kasahara, Jiro; Matsuo, Akiko.

:: Proceedings of the Combustion Institute, 巻 33, 番号 2, 2011, p. 2303-2310.

研究成果: Article

Yageta, Jun ; Shimada, Satoshi ; Matsuoka, Ken ; Kasahara, Jiro ; Matsuo, Akiko. / Combustion wave propagation and detonation initiation in the vicinity of closed-tube end walls. :: Proceedings of the Combustion Institute. 2011 ; 巻 33, 番号 2. pp. 2303-2310.
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