Richtmyer-Meshkov Instability in a Vertical Shock Tube
We describe shock tube experiments on the behaviour of heavy/light gas interfaces submitted to acceleration by an incident shock wave and decelerations by several shock waves reflected from the tube end-wall. The interface, separating two gases of very different density: sulphur hexafluoride (SF6)-air or xenon (Xe)-air, is subjected to the Richtmyer-Meshkov instability (RMI) at the passage of the shock waves. The initial planar interface are either continuous or discontinuous. Schlieren images of the flow are recorded by a high-speed camera and measurements of xenon partial density are obtained from flash X-ray photographs. Planar discontinuous interfaces thicken after interaction with reflected shocks and appear turbulent. The planar continuous interfaces appear non-turbulent and do not thicken much until the second reshock. The Xe-air interface actually thickens less than the SF6-air interface because of shock bifurcation in the boundary layer in the second case. The non-dimensional growth rates are in agreement with the results of similar experiments performed at Caltech by Brouillette and Sturtevant (1993) and Bonazza and Sturtevant (1994).
Key wordsRichtmyer-Meshkov instability Schlieren imaging X-ray densitometry
Unable to display preview. Download preview PDF.
- Bonazza R, Sturtevant S (1994) X-ray measurements of shock-induced mixing at an air-xenon interface. In: Linden PF, Youngs DL, Dalziel SB (ed) Proc. 4th Intl. Workshop on the Physics of Compressible Turbulent Mixing, Cambridge, England. Cambridge Univ PressGoogle Scholar
- Brouillette M, Sturtevant B (1993) Experiments on the Richtmyer-Meshkov instability: small scale perturbations on a plane interface. Phys. Fluids A 5 (4).Google Scholar
- Rodriguez G, Galametz I, Croso H, Haas J-F (1994) Richtmyer-Meshkov instability in a vertical shock tube. In: Linden PF, Youngs DL, Dalziel SB (ed) Proc. 4th Intl. Workshop on the Physics of Compressible Turbulent Mixing, Cambridge, England. Cambridge Univ PressGoogle Scholar
- Rupert V (1992) Shock interface interaction: Current research on the Richtmyer-Meshkov problem, In: Takayama K (ed) Proc. 18th Intl. Symp. on Shock Waves, Sendai, Springer Verlag, pp 83–94Google Scholar
- Zaytsev S.V., Lazareva E.V., Chernukha V.V. and Belyaev V.M. (1985) An experimental investigation and numerical modeling of turbulent mixing in one-dimensional flows. Sov. Phys. Docl. 30: 579.Google Scholar