Shock Accelerated Vortex Ring
dc.contributor.author | Haehn, Nicholas | |
dc.contributor.author | Weber, Chris | |
dc.contributor.author | Oakley, Jason | |
dc.contributor.author | Anderson, Mark | |
dc.contributor.author | Rothamer, David | |
dc.contributor.author | Bonazza, Riccardo | |
dc.date.accessioned | 2009-10-16T14:17:37Z | |
dc.date.available | 2009-10-16T14:17:37Z | |
dc.date.issued | 2009-10-16T14:17:37Z | |
dc.description.abstract | The interaction of a shock wave with a spherical density inhomogeneity leads to the development of a vortex ring through the impulsive deposition of baroclinic vorticity. This phenomenon is experimentally investigated at the Wisconsin Shock Tube Laboratory’s (WiSTL) 9.2 m, downward firing shock tube. The tube has a square internal cross-section (0.25 m x 0.25 m) with multiple fused silica windows for optical access. The spherical soap bubble is generated by means of a pneumatically retracted injector, and released into free-fall 200 ms prior to initial shock acceleration. The downward moving, M = 2.07 shock wave impulsively accelerates the bubble and reflects off the tube end wall. The reflected shock wave re-accelerates the bubble (reshock), which has now developed into a vortex ring, depositing additional vorticity. In the absence of any flow disturbances, the flow behind the reflected shock wave is stationary. As a result, any observed motion of the vortex ring is due to circulation. The shocked vortex ring is imaged at 12,500 fps with planar Mie scattering. | en_US |
dc.identifier.uri | https://hdl.handle.net/1813/14079 | |
dc.language.iso | en_US | en_US |
dc.subject | Shock | en_US |
dc.subject | Instability | en_US |
dc.subject | Bubble | en_US |
dc.subject | Vortex Ring | en_US |
dc.title | Shock Accelerated Vortex Ring | en_US |
dc.type | video/moving image | en_US |
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