پیوندهای مفید
آمار
| تعداد نشریات | 8 |
| تعداد شماره‌ها | 427 |
| تعداد مقالات | 5,578 |
| تعداد مشاهده مقاله | 6,842,963 |
| تعداد دریافت فایل اصل مقاله | 5,811,650 |
Numerical Investigation Of The Best Wind Turbine Shroud Flange Curvature For Maximum Wind Power Extraction | ||
| AUT Journal of Mechanical Engineering | ||
| دوره 7، شماره 2، 2023، صفحه 185-198 اصل مقاله (1.86 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/ajme.2023.22354.6062 | ||
| نویسندگان | ||
| Ali Niknahad؛ Abdolamir Khoshnevis* | ||
| Faculty of Mechanical Engineering, Hakim Sabzevari University, Sabzevar, Iran | ||
| چکیده | ||
| In today's world, net zero energy buildings are growing and developing. These buildings generally supply their energy needs from renewable sources such as wind. Unfortunately, in urban areas, the quality of the passing wind is low and it is not able to create the necessary force for the proper rotation of turbines. To overcome this problem, it is necessary to use a tool that can speed up the flow like a shroud. In the present work, a vertical straight flange is considered at the end of the shroud. The points in the middle of the flange height move to the end of the shroud with a very small interval and create different curves. By using this procedure, a flange with an optimal curve that is able to create the highest mean velocity of air passing through the shroud will be obtained. The results show a significant increase in mean velocity, which has been confirmed by studies of turbulent kinetic energy behind the turbine shroud. Based on the results of a three-dimensional simulation, it is concluded that in the turbine section, a mean velocity increase of 20% can be achieved, which is the first time that using an aerodynamic cross-section for the flange of the shroud and optimizing it has achieved such a great increase in air mean velocity along wind turbine shroud. | ||
| کلیدواژه‌ها | ||
| Shroud؛ Flange؛ wind turbine؛ CFD | ||
| مراجع | ||
|
[1] W. Han, P. Yan, W. Han, Y. He, Design of wind turbines with shroud and lobed ejectors for efficient utilization of low-grade wind energy, Energy, 89 (2015) 687-701.
[2]- A. Dilimulati, T. Stathopoulos, M. Paraschivoiu, Wind turbine designs for urban applications: A case study of shrouded diffuser casing for turbines, Journal of Wind Engineering and Industrial Aerodynamics, 175 (2018) 179-192.
[3]- M. Shahsavarifard, E.L. Bibeau, Performance characteristics of shrouded horizontal axis hydrokinetic turbines in yawed conditions, Ocean Engineering, 197 (2020) 106916.
[4]- A. İlhan, S. TÜMSE, M. TAŞÇI, M. Bilgili, B. ŞAHİN, Particle image velocimetry investigation of the flow for the curved type wind turbine shroud, Journal of Applied Fluid Mechanics, 15(2) (2022).
[5]- M. Lipian, I. Dobrev, M. Karczewski, F. Massouh, K. Jozwik, Small wind turbine augmentation: Experimental investigations of shrouded-and twin-rotor wind turbine systems, Energy, 186 (2019) 115855.
[6]- M. Lipian, I. Dobrev, F. Massouh, K. Jozwik, Small wind turbine augmentation: Numerical investigations of shrouded-and twin-rotor wind turbines, Energy, 201 (2020) 117588.
[7]- Leloudas, G.N. Lygidakis, A.I. Eskantar, I.K. Nikolos, A robust methodology for the design optimization of diffuser augmented wind turbine shrouds, Renewable Energy, 150 (2020) 722-742.
[8]- N.K. Siavash, G. Najafi, T.T. Hashjin, B. Ghobadian, E. Mahmoodi, An innovative variable shroud for micro wind turbines, Renewable Energy, 145 (2020) 1061-1072.
[9]- Y. Ohya, T. Karasudani, A. Sakurai, K.-i. Abe, M. Inoue, Development of a shrouded wind turbine with a flanged diffuser, Journal of wind engineering and industrial aerodynamics, 96(5) (2008) 524-539.
[10]- L. Gish, A. Carandang, G. Hawbaker, Experimental evaluation of a shrouded horizontal axis hydrokinetic turbine with pre-swirl stators, Ocean Engineering, 204 (2020) 107252.
[11]- T. Rezek, R. Camacho, N. Manzanares Filho, E. Limacher, Design of a hydrokinetic turbine diffuser based on optimization and computational fluid dynamics, Applied Ocean Research, 107 (2021) 102484.
[12]- T. Rezek, R. Camacho, N. Manzanares Filho, E. Limacher, Design of a hydrokinetic turbine diffuser based on optimization and computational fluid dynamics, Applied Ocean Research, 107 (2021) 102484.
[13]- A. Aranake, K. Duraisamy, Aerodynamic optimization of shrouded wind turbines, Wind Energy, 20(5) (2017) 877-889.
[14]- M.J. Werle, An enhanced analytical model for airfoil‐based shrouded wind turbines, Wind Energy, 23(8) (2020) 1711-1725.
[15]- S.N. Leloudas, G.N. Lygidakis, A.I. Eskantar, I.K. Nikolos, A robust methodology for the design optimization of diffuser augmented wind turbine shrouds, Renewable Energy, 150 (2020) 722-742.
[16]- M. Yadegari, A. Bak Khoshnevis, A numerical study over the effect of curvature and adverse pressure gradient on development of flow inside gas transmission pipelines, Journal of the Brazilian Society of Mechanical Sciences and Engineering, 42 (2020) 1-15. | ||
|
آمار تعداد مشاهده مقاله: 210 تعداد دریافت فایل اصل مقاله: 325 |
||