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Two Effects of Diaphragm Bulge on Shock Tubes

  • H. G. Hornung
  • J. J. Quirk

Summary

A computational study is presented that has uncovered two important effects in shock tube flows. They occur because the diaphragm has to support a static load before it breaks. This static load usually deforms the diaphragm before rupture. These effects can have significant consequence both in reflected-shock tunnels and in expansion tubes. The first effect is that the diaphragm bulge causes a shock wave to be propagated across the shock tube and to be repeatedly reflected at the axis and the wall. The second is that the contact surface rolls up to form a vortex ring. The sign of the vorticity in the vortex ring depends on the temperature ratio across the diaphragm.

Key words

shock tube expansion tube diaphragm contact surface 

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References

  1. Gaydon AG and Hurle IR (1963) The shock tube in high-temperature chemical physics. Reinhold Publishing Corporation, New YorkGoogle Scholar
  2. Quirk JJ (1997) An Introduction to ArnritA (in preparation), see also the web site at http://www.amrita-cfd.com

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • H. G. Hornung
    • 1
  • J. J. Quirk
    • 1
  1. 1.Graduate Aeronautical LaboratoriesCalifornia Institute of TechnologyPasadenaUSA

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