2026-09-20T15:03:26Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/83835 2023-07-11 col_2142_5131 col_2142_14787 com_2142_5130 com_2142_9630 com_2142_234

Dutton, J. Craig Gregory Elliott Kastengren, Alan Leonard 2015-09-25T21:12:22Z 2015-09-25T21:12:22Z 10000-01-01 2005 2005 High-speed flow visualization of these wakes is also performed. Both conventional cross-correlation analysis and cross-correlation analysis conditioned on the coherent structures are performed to measure the convection velocity of the coherent structures. The coherent structures in the developing shear layers in side-view images of both wakes convect significantly faster than the isentropic convection velocity, and the structure convection velocity is highly sensitive to changes in the freestream flow velocity. The convection velocity of the structures is also highly dependent on the transverse position of the structures in the shear layer. Convection velocity measurements in the end-view images confirm that there is a significant circumferential component of structure convection velocity in the angle-of-attack wake. The pulsation and flapping of the wake core in end-view images contain a short time scale component due to the passage of individual structures and a long time scale component due to more global mechanisms. Made available in DSpace on 2015-09-25T21:12:22Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3199041.pdf: 6097682 bytes, checksum: 2cf9fadf57125eac0ccb8c5a9e1ce8af (MD5) Previous issue date: 2005 Embargo set by: Seth Robbins for item 85116 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 213 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005. http://hdl.handle.net/2142/83835 (MiAaPQ)AAI3199041 eng Engineering, Mechanical Time -Resolved Visualization and Analysis of Compressible Blunt -Base Cylinder Wakes text Mechanical Engineering Mechanical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.