Experimental and numerical investigation of flow over spiral grooved cylinders
This study experimentally and numerically investigates the performance of a circular cylinder with a spiral grooved surface in terms of reducing wind drag. Its application in the overhead high-power conductor plays a vital role, especially in typhoon conditions. Wind tunnel tests have shown that at...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2022-08-01
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| Series: | Advances in Mechanical Engineering |
| Online Access: | https://doi.org/10.1177/16878132221117350 |
| _version_ | 1811320733101457408 |
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| author | Jun Zhang Chao Ma Jing Liu Zhitong Zhang Zhaoming Zhang |
| author_facet | Jun Zhang Chao Ma Jing Liu Zhitong Zhang Zhaoming Zhang |
| author_sort | Jun Zhang |
| collection | DOAJ |
| description | This study experimentally and numerically investigates the performance of a circular cylinder with a spiral grooved surface in terms of reducing wind drag. Its application in the overhead high-power conductor plays a vital role, especially in typhoon conditions. Wind tunnel tests have shown that at the critical Reynolds number (Re), the coefficients of wind drag decrease to a greater extent in a spiral grooved cylinder than in a smooth circular one. Moreover, a cylinder with a shallow groove and a small number of spirals could reduce the coefficient of drag in typhoon conditions. To gain an insight into the underlying fluid mechanism, a large-eddy simulation of turbulent flow from a critical to a super-critical Re has been carried out to approximate the flow separation and turbulent eddies over the spiral grooved cylinder. The results of the wind tunnel test have been used as a benchmark for the numerical results. The flow characteristics have been established about the near-wall flow separation and far wake flow, the pressure coefficient, the skin-friction coefficient, drag coefficient, and Q -criterion field. |
| first_indexed | 2024-04-13T13:04:36Z |
| format | Article |
| id | doaj.art-d8cde375417f4177b1250955a7bf0ad0 |
| institution | Directory Open Access Journal |
| issn | 1687-8140 |
| language | English |
| last_indexed | 2024-04-13T13:04:36Z |
| publishDate | 2022-08-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Advances in Mechanical Engineering |
| spelling | doaj.art-d8cde375417f4177b1250955a7bf0ad02022-12-22T02:45:50ZengSAGE PublishingAdvances in Mechanical Engineering1687-81402022-08-011410.1177/16878132221117350Experimental and numerical investigation of flow over spiral grooved cylindersJun Zhang0Chao Ma1Jing Liu2Zhitong Zhang3Zhaoming Zhang4Key Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaKey Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaTechnology Centre for Offshore and Marine Singapore, Singapore, SingaporeKey Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaKey Laboratory of Unsteady Aerodynamics and Flow Control, Ministry of Industry and Information Technology, College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, ChinaThis study experimentally and numerically investigates the performance of a circular cylinder with a spiral grooved surface in terms of reducing wind drag. Its application in the overhead high-power conductor plays a vital role, especially in typhoon conditions. Wind tunnel tests have shown that at the critical Reynolds number (Re), the coefficients of wind drag decrease to a greater extent in a spiral grooved cylinder than in a smooth circular one. Moreover, a cylinder with a shallow groove and a small number of spirals could reduce the coefficient of drag in typhoon conditions. To gain an insight into the underlying fluid mechanism, a large-eddy simulation of turbulent flow from a critical to a super-critical Re has been carried out to approximate the flow separation and turbulent eddies over the spiral grooved cylinder. The results of the wind tunnel test have been used as a benchmark for the numerical results. The flow characteristics have been established about the near-wall flow separation and far wake flow, the pressure coefficient, the skin-friction coefficient, drag coefficient, and Q -criterion field.https://doi.org/10.1177/16878132221117350 |
| spellingShingle | Jun Zhang Chao Ma Jing Liu Zhitong Zhang Zhaoming Zhang Experimental and numerical investigation of flow over spiral grooved cylinders Advances in Mechanical Engineering |
| title | Experimental and numerical investigation of flow over spiral grooved cylinders |
| title_full | Experimental and numerical investigation of flow over spiral grooved cylinders |
| title_fullStr | Experimental and numerical investigation of flow over spiral grooved cylinders |
| title_full_unstemmed | Experimental and numerical investigation of flow over spiral grooved cylinders |
| title_short | Experimental and numerical investigation of flow over spiral grooved cylinders |
| title_sort | experimental and numerical investigation of flow over spiral grooved cylinders |
| url | https://doi.org/10.1177/16878132221117350 |
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