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https://hdl.handle.net/2440/135765
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Type: | Journal article |
Title: | Finite-length porous surfaces for control of a turbulent boundary layer |
Author: | Jafari, A. Cazzolato, B. Arjomandi, M. |
Citation: | Physics of Fluids, 2022; 34(4):1-12 |
Publisher: | AIP Publishing |
Issue Date: | 2022 |
ISSN: | 1070-6631 1089-7666 |
Statement of Responsibility: | Azadeh Jafari, Benjamin Cazzolato, and Maziar Arjomandi |
Abstract: | This study investigates the potential of finite-length porous surfaces with a subsurface chamber for the control of the turbulent boundary layer. The effect of the subsurface chamber on the boundary layer is investigated by hot-wire anemometry measurements of the boundary layer response to different chamber configurations. Three different chamber configurations were investigated: a common cavity that connected the array of surface perforations, a locally reacting chamber with individual cavities underneath each perforation, and chambers that connected the perforations in streamwise or spanwise flow directions. It was found that a common backing cavity and individual cavities reduced the peak turbulence intensity, whereas the test case with streamwise or spanwise channels increased the turbulence intensity and strengthened large-scale turbulent structures within the boundary layer. While both common and individual cavities were effective in reducing turbulence, the individual cavities created a larger reduction in the pre-multiplied spectrum with an average of 80% at large scales compared to between 40% and 60% reduction at large scales for common cavities with different volumes. Hence, a short porous surface with individual cavities underneath each perforation was found to be the most effective turbulence-reducing configuration among the investigated cases. |
Rights: | © 2022 Author(s). Published under an exclusive license by AIP Publishing. |
DOI: | 10.1063/5.0084505 |
Grant ID: | http://purl.org/au-research/grants/arc/DP200101961 |
Published version: | http://dx.doi.org/10.1063/5.0084505 |
Appears in Collections: | Mechanical Engineering publications |
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