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Numerical study of the effects of the rupture process of a secondary diaphragm in expansion tubes

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The results of a numerical study are described in which the interactions of a primary shock wave with a secondary diaphragm in expansion tubes are taken into account. The developing wave pattern in the interacting process of the shock with a secondary diaphragm are visualized by many kinds of figures (e.g., the time-distance diagrams of the wave phenomena on the axis, the acoustic impedance contours, and the time histories of the pitot pressure on the axis), and the influences of the shape and rupture process of the diaphragm on the quality of the test gas are explored.

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References

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  3. Roberts, G. T., Morgan, R. G. and Stalker R. J., Influence of Secondary Diaphragm on Flow Quality in Shock-Expansion Tubes, Shock Waves, Springer Verlag, (1995), 203.

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Additional information

Kazuyuki Kage: He received his M. Eng. degree in Mechanical Engineering in 1970 and his Dr. Eng. degree in 1976 from Kyushu University. He has worked in the Department of Production Systems Engineering, Oita University as a professor since 1973. His research interests include compressible flow, shock wave phenomena and computational fluid dynamics.

Katsuya Ishimatsu: He received his Dr. Eng. degree in 1996 from Kyushu University. He has worked in the Department of Production Systems Engineering, Oita University as a research assistant since 1983. His research interests include cross flow turbines and computational fluid dynamics.

Toyoyasu Okubayashi: He works in the Department of Production Systems Engineering, Oita University as a research staff member since 1976. His research interests include cross flow turbines and fluid engineering.

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Kage, K., Ishimatsu, K. & Okubayashi, T. Numerical study of the effects of the rupture process of a secondary diaphragm in expansion tubes. J Vis 6, 107–114 (2003). https://doi.org/10.1007/BF03181615

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Keywords

  • Expansion tubes
  • Secondary diaphragm
  • Shock propagation
  • Numerical visualizeation
  • Contact surface