Development and Application of Particle Image Velocimetry in High-Speed Separated Flow: Two-Dimensional Base Cavities

A new particle image velocimetry (PIV) system has been developed to obtain two-dimensional instantaneous velocity data over a planar region in high-speed separated flows for the quantitative analysis of turbulent and unsteady flow structures. This PIV system is the first of its type to incorporate sub-micron seed particles and birefringent image shifting for the resolution of flow velocity in separated regions. The system was also developed with improved in-plane spatial resolution over previous high-speed flow PIV applications by using a 1.0 mm$\sp2$ interrogation region (in flowfield dimensions) for each independent velocity measurement. The system has been proven in preliminary experiments using a simple low-speed round jet flow and had been validated for accuracy with both known-displacement simulated PIV photographs and uniform flow experiments at Mach 0.5 (170 m/s) for comparison to pressure and laser Doppler velocimeter (LDV) data.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2014

Author dc:creator

• Molezzi, Michael Joseph

Contributors dc:contributor

• Dutton, J. Craig

• Engineering, Aerospace
• Engineering, Mechanical

Identifier

(UMI)AAI9329114

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/72239