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Shock Accelerated Vortex Ring

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dc.contributor.authorHaehn, Nicholas
dc.contributor.authorWeber, Chris
dc.contributor.authorOakley, Jason
dc.contributor.authorAnderson, Mark
dc.contributor.authorRothamer, David
dc.contributor.authorBonazza, Riccardo
dc.date.accessioned2009-10-16T14:17:37Z
dc.date.available2009-10-16T14:17:37Z
dc.date.issued2009-10-16T14:17:37Z
dc.description.abstractThe 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.urihttps://hdl.handle.net/1813/14079
dc.language.isoen_USen_US
dc.subjectShocken_US
dc.subjectInstabilityen_US
dc.subjectBubbleen_US
dc.subjectVortex Ringen_US
dc.titleShock Accelerated Vortex Ringen_US
dc.typevideo/moving imageen_US

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