Evaluation of air vents and ramp angles on the performance of orifice spillway aerators
The performance of steep slope ( > 30o) orifice spillway aerators by varying air vent size and ramp angles were experimentally studied. Three air vents of different sizes and five ramps with different angles were tested on a physical model of Bunji dam spillway, which was constructed at Irrigation...
| Autores principales: | , , , |
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| Formato: | Journal Article |
| Lenguaje: | Inglés |
| Publicado: |
2016
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| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/81226 |
| _version_ | 1855535530835443712 |
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| author | Sarwar, M.K. Chaudary, Z.A. Bhatti, Muhammad Tousif Khan, D. |
| author_browse | Bhatti, Muhammad Tousif Chaudary, Z.A. Khan, D. Sarwar, M.K. |
| author_facet | Sarwar, M.K. Chaudary, Z.A. Bhatti, Muhammad Tousif Khan, D. |
| author_sort | Sarwar, M.K. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | The performance of steep slope ( > 30o) orifice spillway aerators by varying air vent size and ramp angles were experimentally studied. Three air vents of different sizes and five ramps with different angles were tested on a physical model of Bunji dam spillway, which was constructed at Irrigation Research Station Nandipur, Gujranwala. In each case, the cavity length, cavity pressure, flow velocity and water depth at the aerator were measured by changing operating conditions. Non-dimensional jet length ( ), air entrainment co-efficient (ß) and non-dimensional cavity pressure (Pn) were computed to evaluate the performance of the aerator against ramp angle and air vent size. Results noted an improvement in the performance of aerator with the increase of air vent size. However, the ramp initially improved the performance of the aerator but at higher reservoir level with large gate opening, no significant improvement in the performance of the aerator was noted, rather negative impact was observed due to reduction in cavity pressure. |
| format | Journal Article |
| id | CGSpace81226 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| record_format | dspace |
| spelling | CGSpace812262025-03-11T09:50:20Z Evaluation of air vents and ramp angles on the performance of orifice spillway aerators Sarwar, M.K. Chaudary, Z.A. Bhatti, Muhammad Tousif Khan, D. irrigation engineering irrigation efficiency water power stream flow flow rate energy technology dam construction spillways impact assessment reservoirs hydraulics The performance of steep slope ( > 30o) orifice spillway aerators by varying air vent size and ramp angles were experimentally studied. Three air vents of different sizes and five ramps with different angles were tested on a physical model of Bunji dam spillway, which was constructed at Irrigation Research Station Nandipur, Gujranwala. In each case, the cavity length, cavity pressure, flow velocity and water depth at the aerator were measured by changing operating conditions. Non-dimensional jet length ( ), air entrainment co-efficient (ß) and non-dimensional cavity pressure (Pn) were computed to evaluate the performance of the aerator against ramp angle and air vent size. Results noted an improvement in the performance of aerator with the increase of air vent size. However, the ramp initially improved the performance of the aerator but at higher reservoir level with large gate opening, no significant improvement in the performance of the aerator was noted, rather negative impact was observed due to reduction in cavity pressure. 2016 2017-05-29T03:46:54Z 2017-05-29T03:46:54Z Journal Article https://hdl.handle.net/10568/81226 en Open Access Sarwar, M. K.; Chaudary, Z. A.; Bhatti, Muhammad Tousif; Khan, D. 2016. Evaluation of air vents and ramp angles on the performance of orifice spillway aerators. Journal of Engineering and Applied Sciences, 35(1):85-93. |
| spellingShingle | irrigation engineering irrigation efficiency water power stream flow flow rate energy technology dam construction spillways impact assessment reservoirs hydraulics Sarwar, M.K. Chaudary, Z.A. Bhatti, Muhammad Tousif Khan, D. Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title | Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title_full | Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title_fullStr | Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title_full_unstemmed | Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title_short | Evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| title_sort | evaluation of air vents and ramp angles on the performance of orifice spillway aerators |
| topic | irrigation engineering irrigation efficiency water power stream flow flow rate energy technology dam construction spillways impact assessment reservoirs hydraulics |
| url | https://hdl.handle.net/10568/81226 |
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