The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel
The aim of the present work was to investigate the effects of operating conditions on the flow behaviors and the generated power produced by breastshot waterwheels both experimentally and numerically. The experiments were carried out using a breastshot water wheel with the diameter of 500 mm, the wi...
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| Language: | English |
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Elsevier
2025-03-01
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| Series: | Ain Shams Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447925000334 |
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| author | Agato Agato Deendarlianto Deendarlianto Indarto Indarto Alfeus Sunarso |
| author_facet | Agato Agato Deendarlianto Deendarlianto Indarto Indarto Alfeus Sunarso |
| author_sort | Agato Agato |
| collection | DOAJ |
| description | The aim of the present work was to investigate the effects of operating conditions on the flow behaviors and the generated power produced by breastshot waterwheels both experimentally and numerically. The experiments were carried out using a breastshot water wheel with the diameter of 500 mm, the width of 140 mm and the number of blades of 14. The wheel was installed on a channel with the weir head of 250 mm, the headrace length of 100 mm, and the water flow rate of 0.014 m3/sec. In the numerical simulation, the hydraulic channel was considered to be laterally symmetric, therefore only half of the section was taken into account. The simulation of free surface movement was calculated using the volume of fluid (VOF) method, and the static and rotating region interface was treated using the sliding mesh interface (SMI). The calculated torque and power, as well as the flow patterns under various operating conditions are in a good agreement with those of the experiments. The visualization of the flow shows that the lower the rotational speed of the wheel, the greater the volume of water hitting the wheel blades, and the greater the torque produced by the water wheel. It was also confirmed that the periodical change of torque depends on the rotational speed and the number of wheel blades, and relates to the periodical change of the pressure on the blade surfaces. Furthermore, it is shown that the forward pressure that generates a positive torque mainly applies on a blade at a specific location. Under the decrease of rotational speed, the location of maximum forward pressure moves from the downstream blade to the upstream blade. |
| format | Article |
| id | doaj-art-7274d2c855234ea8b10490ac86c381c9 |
| institution | Kabale University |
| issn | 2090-4479 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj-art-7274d2c855234ea8b10490ac86c381c92025-02-10T04:34:19ZengElsevierAin Shams Engineering Journal2090-44792025-03-01163103292The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheelAgato Agato0Deendarlianto Deendarlianto1Indarto Indarto2Alfeus Sunarso3Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Jalan Grafika No 2 Kampus UGM, Yogyakarta 55281 Indonesia; Department of Agricultural, Politeknik Negeri Pontianak, Jalan Ahmad Yani Pontianak Kalimantan Barat 78124 IndonesiaDepartment of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Jalan Grafika No 2 Kampus UGM, Yogyakarta 55281 Indonesia; Center for Energy Studies, Universitas Gadjah Mada, Sekip K-1A, Kampus UGM, Yogyakarta 55281 Indonesia; Corresponding author at: Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Jl. Grafika No 2, Yogyakarta 55281, Indonesia.Department of Mechanical and Industrial Engineering, Universitas Gadjah Mada, Jalan Grafika No 2 Kampus UGM, Yogyakarta 55281 Indonesia; Center for Energy Studies, Universitas Gadjah Mada, Sekip K-1A, Kampus UGM, Yogyakarta 55281 IndonesiaDepartment of Mechanical Engineering, Politeknik Negeri Pontianak, Jalan Ahmad Yani Pontianak Kalimantan Barat 78124 IndonesiaThe aim of the present work was to investigate the effects of operating conditions on the flow behaviors and the generated power produced by breastshot waterwheels both experimentally and numerically. The experiments were carried out using a breastshot water wheel with the diameter of 500 mm, the width of 140 mm and the number of blades of 14. The wheel was installed on a channel with the weir head of 250 mm, the headrace length of 100 mm, and the water flow rate of 0.014 m3/sec. In the numerical simulation, the hydraulic channel was considered to be laterally symmetric, therefore only half of the section was taken into account. The simulation of free surface movement was calculated using the volume of fluid (VOF) method, and the static and rotating region interface was treated using the sliding mesh interface (SMI). The calculated torque and power, as well as the flow patterns under various operating conditions are in a good agreement with those of the experiments. The visualization of the flow shows that the lower the rotational speed of the wheel, the greater the volume of water hitting the wheel blades, and the greater the torque produced by the water wheel. It was also confirmed that the periodical change of torque depends on the rotational speed and the number of wheel blades, and relates to the periodical change of the pressure on the blade surfaces. Furthermore, it is shown that the forward pressure that generates a positive torque mainly applies on a blade at a specific location. Under the decrease of rotational speed, the location of maximum forward pressure moves from the downstream blade to the upstream blade.http://www.sciencedirect.com/science/article/pii/S2090447925000334Waterwheel performanceFlow visualizationNumerical simulationEffects of rotational speedBlade pressure |
| spellingShingle | Agato Agato Deendarlianto Deendarlianto Indarto Indarto Alfeus Sunarso The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel Ain Shams Engineering Journal Waterwheel performance Flow visualization Numerical simulation Effects of rotational speed Blade pressure |
| title | The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| title_full | The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| title_fullStr | The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| title_full_unstemmed | The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| title_short | The experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| title_sort | experimental and numerical studies on the effects of the operating conditions on the performance of breastshot waterwheel |
| topic | Waterwheel performance Flow visualization Numerical simulation Effects of rotational speed Blade pressure |
| url | http://www.sciencedirect.com/science/article/pii/S2090447925000334 |
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