The effect of placing a grid over the outlet of the three-dimensional turbulent wall jet
| dc.contributor.advisor | Hall, J.W. | |
| dc.contributor.author | Després, Sébastien | |
| dc.date.accessioned | 2023-03-01T16:16:15Z | |
| dc.date.available | 2023-03-01T16:16:15Z | |
| dc.date.issued | 2013 | |
| dc.date.updated | 2023-03-01T15:01:05Z | |
| dc.description.abstract | The three-dimensional turbulent wall jet has a lateral half-width that is 5 to 8 times greater than its vertical half-height. This has been previously attributed to strong turbulence generated secondary flow caused by the passage of coherent vortex-ring structures formed at the nozzle exit. In order to assess whether the large lateral growth of the jet is tied to these structures, a grid was placed at the nozzle exit to disrupt the shear-layer that produces the vortex rings at the outlet. Here, the jet was formed using a 0.038m round contoured nozzle with an exit Reynolds number of 108,000. The grid has a mesh wire size of 0.2mm with an opening of 1mm giving it a solidity ratio of 0.4. Measurements of the jet with and without the grid were taken using hot-wire anemometry and stereoscopic Particle Image Velocimetry (PIV). The results indicate that the grid delays the lateral growth of the jet and increases its vertical growth. By x/0=40 though, these differences were minimal. The presence of the grid also decreased the mass entrainment and mixing associated with the jet at each downstream location investigated. | |
| dc.description.copyright | © Sébastien P. Després, 2013 | |
| dc.format | text/xml | |
| dc.format.extent | x, 69 pages | |
| dc.format.medium | electronic | |
| dc.identifier.oclc | (OCoLC)1316713280 | en |
| dc.identifier.other | Thesis 9165 | en |
| dc.identifier.uri | https://unbscholar.lib.unb.ca/handle/1882/13189 | |
| dc.language.iso | en_CA | |
| dc.publisher | University of New Brunswick | |
| dc.rights | http://purl.org/coar/access_right/c_abf2 | |
| dc.subject.discipline | Mechanical Engineering | |
| dc.subject.lcsh | Wall jets. | en |
| dc.subject.lcsh | Particle image velocimetry. | en |
| dc.title | The effect of placing a grid over the outlet of the three-dimensional turbulent wall jet | |
| dc.type | master thesis | |
| thesis.degree.discipline | Mechanical Engineering | |
| thesis.degree.fullname | Master of Science in Engineering | |
| thesis.degree.grantor | University of New Brunswick | |
| thesis.degree.level | masters | |
| thesis.degree.name | M.Sc.E. |
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