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Oblique shock interactions with gas cylinder interfaces


Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/21012

Oblique shock interactions with gas cylinder interfaces

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Title: Oblique shock interactions with gas cylinder interfaces
Author: White, Ross
Advisor(s): Vorobieff, Peter
Committee Member(s): Kumar, Sanjay
Poroseva, Svetlana
Truman, C. Randall
Department: University of New Mexico. Dept. of Mechanical Engineering
Subject(s): Richtmyer Meshkov Instability
Particle Lag Instability
Oblique shock interaction
gas cylinder
LC Subject(s): Unsteady flow (Fluid dynamics)
Shock (Mechanics)
Gas tubes.
Degree Level: Masters
Abstract: This thesis presents an experimental study of fluid instabilities formed due to an oblique interatction of a shock wave with a cylindrical gas column seeded with glycol droplets. Two gases are injected into quiescent air to form the column. The first is sulfur hexafluoride (SF6) which generates the well-known Richtmyer-Meshkov Instability (RMI) when impulsively accelerated by a shock wave. This instability is formed due to the misalignment of the pressure and density gradients during the acceleration phase. The second is air. In this case, there is no macroscopic density gradient between the gas column and the surrounding air. Nonetheless, an instability similar to RMI develops due to the presence of the glycol droplets. Experimental studies are performed at an oblique angle of 15 degrees and a Mach number of 1.67. Experiments of this nature typically make an assumption that the cylindrical gas column is nominally two-dimensional to simplify the problem. The validity of this assumption is explored by investigating the morphology of the instabilities in multiple horizontal planes and a vertical plane. Major variations of the morphology only occur near the bounding walls, with less variation far from these walls. An investigation of the rotation of the gas column is also presented.
Graduation Date: July 2012
URI: http://hdl.handle.net/1928/21012

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