An experimental investigation of organized structure and mixing in compressible turbulent free shear layers

The large scale structure and scalar transport characteristics of compressible turbulent mixing layers have been experimentally investigated at various levels of compressibility in order to study the fundamental effects of compressibility on the nature of the mixing layer. Nonintrusive optical diagnostic techniques were employed to image the large structures. Both Mie scattering from condensed ethanol droplets and laser-induced fluorescence from seeded nitric oxide were used. The LIF experiments were utilized to avoid potential particle dynamics effects associated with the Mie scattering experiments. Sizeable ensembles of digital images were collected for a variety of seeding styles, image planes and at three distinct flow conditions. Analysis of the samples provided mean and standard deviation profiles, two-dimensional spatial covariance fields and passive scalar probability density functions.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Science and Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Messersmith, Nathan Lee

Contributors dc:contributor

• Dutton, J. Craig

• Engineering, Aerospace
• Engineering, Mechanical

Statement dc:rights

• Copyright 1992 Messersmith, Nathan Lee

Language dc:language

eng

Identifier

AAI9215855
(UMI)AAI9215855

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22703