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Proceedings Paper

Interaction between a flame kernel and a shock wave generated by spark discharge
Author(s): Kazuhiro Ishii; H. Shimomura; T. Tsuboi
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Paper Abstract

In the present work, interaction of flame kernels with shock waves generated by spark discharge has been studied using a plane or a cylindrical shock wave reflector fixed to a combustion chamber. The ignition unit was designed to produce capacitance sparks whose duration was less than 1 microsecond. Schlieren photographs show that the flame kernel development with the cylindrical reflector is initially suppressed by shock-flame interaction. Afterwards the surface area of the flame kernel with the cylindrical reflector exceeds that without reflector. This result is also confirmed in the experimental results on ignition probabilities obtained from measurement of OH radiation emitted by the flame kernel. As for the plane reflector, flame kernel development is promoted in particular for reflectors placed close to the spark gap. The calculated pressure and temperature profiles explain the shock suppression for the cylindrical reflector.

Paper Details

Date Published: 17 April 2001
PDF: 10 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424331
Show Author Affiliations
Kazuhiro Ishii, Yokohama National Univ. (Japan)
H. Shimomura, Yokohama National Univ. (Japan)
T. Tsuboi, Yokohama National Univ. (Japan)

Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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