Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water
In this study, Particulate Image Velocimetry (PIV) was utilized to determine the flow characteristics of three side-by-side circular cylinders with a base bleed. The height of the water was set as hW=20 mm which has characteristics of shallow water and flow images were captured from an elevation of...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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levent
2023-06-01
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| Series: | International Journal of Pioneering Technology and Engineering |
| Subjects: | |
| Online Access: | https://ijpte.com/index.php/ijpte/article/view/44 |
| _version_ | 1797248247218044928 |
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| author | Mustafa Atakan Akar Hüseyin Akıllı |
| author_facet | Mustafa Atakan Akar Hüseyin Akıllı |
| author_sort | Mustafa Atakan Akar |
| collection | DOAJ |
| description | In this study, Particulate Image Velocimetry (PIV) was utilized to determine the flow characteristics of three side-by-side circular cylinders with a base bleed. The height of the water was set as hW=20 mm which has characteristics of shallow water and flow images were captured from an elevation of hL/hW= 0.5 (mid-plane of water height). The freestream velocity of water and circular cylinder diameters were chosen as U∞=0.125 m/sec and D=40 mm, respectively which are the corresponding Reynolds number of ReD=5000. Three different gap/diameter ratios between the cylinders were tested as G/D=1.0, 1.25, and 1.5 throughout the experiments. As a passive flow control technique, base bleed slots located through the cylinders were used with the dimensionless width ratio of B/D= 0.05 to 0.25 with 0.05 increment. As a result of the study, the base bleed was found out an effective way to control unsteady wake. Besides, whereas the increasing height of VSP results in further decrement turbulence statistics, Increasing the width of base bleed leads to a reduction of maximum Reynolds shear stress concentration. Nevertheless, jet deflection flow cannot be avoided for the G/D=1.25 while, flow deflection is avoided with all base bleed case the gap ratio increases to G/D=1.5. The wake size of each cylinder is almost the same for G/D=1.5. |
| first_indexed | 2024-04-24T20:11:33Z |
| format | Article |
| id | doaj.art-f59a5790ca8f4ba2828276be51bb13a6 |
| institution | Directory Open Access Journal |
| issn | 2822-454X |
| language | English |
| last_indexed | 2024-04-24T20:11:33Z |
| publishDate | 2023-06-01 |
| publisher | levent |
| record_format | Article |
| series | International Journal of Pioneering Technology and Engineering |
| spelling | doaj.art-f59a5790ca8f4ba2828276be51bb13a62024-03-23T09:04:17ZengleventInternational Journal of Pioneering Technology and Engineering2822-454X2023-06-0120112813410.56158/jpte.2023.44.2.0144Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow WaterMustafa Atakan Akar0https://orcid.org/0000-0002-0192-0605Hüseyin Akıllı1https://orcid.org/0000-0002-5342-7046Faculty of Engineering, Automotive Engineering, Cukurova University, Adana, TurkeyThe Faculty of Engineering, Mechanical Engineering, Cukurova University, Adana, TurkeyIn this study, Particulate Image Velocimetry (PIV) was utilized to determine the flow characteristics of three side-by-side circular cylinders with a base bleed. The height of the water was set as hW=20 mm which has characteristics of shallow water and flow images were captured from an elevation of hL/hW= 0.5 (mid-plane of water height). The freestream velocity of water and circular cylinder diameters were chosen as U∞=0.125 m/sec and D=40 mm, respectively which are the corresponding Reynolds number of ReD=5000. Three different gap/diameter ratios between the cylinders were tested as G/D=1.0, 1.25, and 1.5 throughout the experiments. As a passive flow control technique, base bleed slots located through the cylinders were used with the dimensionless width ratio of B/D= 0.05 to 0.25 with 0.05 increment. As a result of the study, the base bleed was found out an effective way to control unsteady wake. Besides, whereas the increasing height of VSP results in further decrement turbulence statistics, Increasing the width of base bleed leads to a reduction of maximum Reynolds shear stress concentration. Nevertheless, jet deflection flow cannot be avoided for the G/D=1.25 while, flow deflection is avoided with all base bleed case the gap ratio increases to G/D=1.5. The wake size of each cylinder is almost the same for G/D=1.5.https://ijpte.com/index.php/ijpte/article/view/44flow controlshallow waterbase bleedside-by-side cylinders |
| spellingShingle | Mustafa Atakan Akar Hüseyin Akıllı Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water International Journal of Pioneering Technology and Engineering flow control shallow water base bleed side-by-side cylinders |
| title | Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water |
| title_full | Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water |
| title_fullStr | Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water |
| title_full_unstemmed | Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water |
| title_short | Base Bleed Flow Control Tool for Circular Cylinders with three Side-By-Side Arrangements in Shallow Water |
| title_sort | base bleed flow control tool for circular cylinders with three side by side arrangements in shallow water |
| topic | flow control shallow water base bleed side-by-side cylinders |
| url | https://ijpte.com/index.php/ijpte/article/view/44 |
| work_keys_str_mv | AT mustafaatakanakar basebleedflowcontroltoolforcircularcylinderswiththreesidebysidearrangementsinshallowwater AT huseyinakıllı basebleedflowcontroltoolforcircularcylinderswiththreesidebysidearrangementsinshallowwater |