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Planar shock wave interaction with a multiphase cylinder


Please use this identifier to cite or link to this item: http://hdl.handle.net/1928/20763

Planar shock wave interaction with a multiphase cylinder

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Title: Planar shock wave interaction with a multiphase cylinder
Author: Conroy, Joseph
Advisor(s): Vorobieff, Peter
Committee Member(s): Truman, Randall
Nygren, Richard
Department: University of New Mexico. Dept. of Mechanical Engineering
Subject: fluids
shock wave
particle lag instability
LC Subject(s): Shear flow.
Shock waves.
Stokes equations.
Shock tubes.
Degree Level: Masters
Abstract: We present an experimental study that visualizes the effects of a planar shock front passing through air (or SF6) randomly seeded with glycol droplets or smoke particles. It was observed, using a high-speed multiple-CCD (charge coupled device) camera, that an instability occurs as the shock wave bypasses the slow-moving column of gas. This produced evident perturbation at the interface. The flow morphology of the gas column consists of a pair of counter-rotating vortices that develops downstream from the initial conditions as well as some secondary instabilities (in certain cases). Some images also show a trailing tail due to larger particles lagging behind the flow. The data and images obtained in the experiments were gathered using a tilt-able shock tube made of solid stock aluminum, two green-light lasers, and other high-speed diagnostics. Our experimental data cover a range of Mach numbers from 1.22 to 2.02. Each experimental run was performed with the shock tube in the horizontal position, causing only 2-D visualization effects.
Graduation Date: May 2012
URI: http://hdl.handle.net/1928/20763

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