Ice-Induced Unsteady Flowfield Effects on Airfoil Performance

Vortex structures observed in the shear layer were presumed to be the cause of large-scale pressure fluctuations upstream of reattachment at small angles of attack. Pressure spectra near reattachment exhibited wide bandwidth frequency peaks that indicated a non-periodic phenomenon and corresponded to the regular mode often associated with vortex movement in and aft of the shear layer. Strouhal numbers ranged from 0.53 to 0.73. Although vortex shedding was rarely observed, the convection of surface pressure fluctuations occurred at approximately half the freestream velocity, similar to shedding velocities reported by others.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Aerospace Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Gurbacki, Holly Marie

Contributors dc:contributor

• Bragg, Michael B.

• Engineering, Mechanical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3111550

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/85080