Planar shock wave interaction with a multiphase cylinder

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.

Name thesis:degree_name

Mechanical Engineering

Level thesis:degree_level

Masters

Discipline thesis:degree_discipline

Mechanical Engineering

Year

2012

Author dc:creator

• Conroy, Joseph

Contributors dc:contributor

• Vorobieff, Peter
• Truman, Randall
• Nygren, Richard

• Shear flow
• Vortex-motion
• Shock waves
• Stokes equations
• Shock tubes.

Language dc:language

English

Identifier

https://digitalrepository.unm.edu/me_etds/58

OAI identifier oai:identifier

oai:digitalrepository.unm.edu:me_etds-1057