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An experimental study of the flow after shock interactions with cylindrical helium inhomegeneities

Budzinski, J. M. and Marble, F. E. and Zukoski, E. E. (1995) An experimental study of the flow after shock interactions with cylindrical helium inhomegeneities. Los Alamos National Laboratory , Los Alamos, NM.

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A shock traveling in air interacts with a laminar jet of helium flowing normal to the direction of shock propagation. Planar laser Rayleigh scattering is used to study the deformation and motion of the originally circular jet cross-section. The velocity of the jet before the shock interaction is much less than the velocities generated by the shock wave. Thus, the helium jet serves to create a cylindrical bubble of a lighter density gas imbedded in a heavier one. Four different shock Mach numbers (1.066, 1.14, 1.5, and 2.0) are studied. Two different jet/air density ratios are examined by using pure helium in the jet in one case, and a mixture of airlhelium in the other. After the shock interaction, a vortex pair forms from the baroclinically generated vorticity. The experiments measure the velocity of the helium relative to the surrounding air, the spacing between the vortex cores, and the circulation of the vortices. Experiments viewing the reflected shock interaction are also performed. Excellent agreement is found with previous computational studies.

Item Type:Report or Paper (Technical Report)
Additional Information:© 1995, Los Alamos Laboratory.
Group:Guggenheim Jet Propulsion Center
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Other Numbering System NameOther Numbering System ID
Guggenheim Jet Propulsion Center UNSPECIFIED
Los AlamosLA-UR-95-317
Record Number:CaltechAUTHORS:20110204-100414048
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22011
Deposited By: Ruth Sustaita
Deposited On:02 Mar 2011 21:53
Last Modified:03 Oct 2019 02:33

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