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The effect of freestream turbulence and outer layer manipulation on turbulent boundary layer flow on surfaces with convex and concave curvatures
| dc.creator | Syed, Irshad Hussain | |
| dc.date.accessioned | 2012-06-07T22:42:59Z | |
| dc.date.available | 2012-06-07T22:42:59Z | |
| dc.date.created | 1995 | |
| dc.date.issued | 1995 | |
| dc.identifier.uri | https://hdl.handle.net/1969.1/ETD-TAMU-1995-THESIS-S94 | |
| dc.description | Due to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item. | en |
| dc.description | Includes bibliographical references. | en |
| dc.description | Issued also on microfiche from Lange Micrographics. | en |
| dc.description.abstract | Effect of freestream turbulence on concave and convex surfaces with mild curvature (5/R-0.016 and 0.022 for convex and concave surfaces respectively) and pressure gradient was examined. Turbulence levels of 3.6 and 8.5 percent were generated with the help of two grids of 93 and 71 percent porosity respectively. Skin friction was determined from the measured boundary layer profiles. A rake of Preston tubes was used to measure spanwise skin friction distribution on both surfaces. Goertler vortices observed on concave surface were present even at higher turbulence level. The curvature and pressure gradient effect was not strong enough to cause a substantial growth of the internal layer. Measurements in the recovery section showed that the boundary layer did not recover from the curvature effect. Effect of outer layer manipulation on concave wall was also studied by using a Large Eddy Breakup device. The skin friction increased on the concave wall despite using the device showing a predominant effect of concave curvature. However, in the recovery section, a decrease in skin friction indicated the effectiveness of the device. | en |
| dc.format.medium | electronic | en |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en_US | |
| dc.publisher | Texas A&M University | |
| dc.rights | This thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use. | en |
| dc.subject | aerospace engineering. | en |
| dc.subject | Major aerospace engineering. | en |
| dc.title | The effect of freestream turbulence and outer layer manipulation on turbulent boundary layer flow on surfaces with convex and concave curvatures | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | aerospace engineering | en |
| thesis.degree.name | M.S. | en |
| thesis.degree.level | Masters | en |
| dc.type.genre | thesis | en |
| dc.type.material | text | en |
| dc.format.digitalOrigin | reformatted digital | en |
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