Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency
Abstract Recently, slotted airfoils have been introduced as a passive flow control approach. The slotted airfoil method resulted in stall delay and enhanced the lift coefficient. The single-slot airfoil is unable to delay stall if the flow is injected downstream of the separation point at the stall...
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Nature Portfolio
2025-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-87000-z |
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| author | Mohamed A. Aziz Mohamed A. Khalifa M. A. Abdelrahman Haitham Elshimy Ahmed M. Elsayed |
| author_facet | Mohamed A. Aziz Mohamed A. Khalifa M. A. Abdelrahman Haitham Elshimy Ahmed M. Elsayed |
| author_sort | Mohamed A. Aziz |
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| description | Abstract Recently, slotted airfoils have been introduced as a passive flow control approach. The slotted airfoil method resulted in stall delay and enhanced the lift coefficient. The single-slot airfoil is unable to delay stall if the flow is injected downstream of the separation point at the stall angle of attack. A multi-slot airfoil ensures air is injected along the airfoil suction side, delaying stalls over a large range of AOA. The current study focuses on enhancing wind turbine blades’ efficiency by utilizing a novel multi-slot NACA23012C airfoil design as a passive control approach. A numerical study of the optimal grid number was carried out, followed by validating the numerical model with previous experimental results in the literature. The numerical study is followed by a study of the effect of the number of airfoil slots: one, two, three, four, five, and six. The characteristics of the flow field were analyzed to explain the benefit of applying multi-slotted on the aerodynamic performance of an airfoil with a high AOA at Reynolds number 2.74 × 105. The findings showed a significant improvement in the lift coefficient values and the delayed stall AOA for multi-slot airfoils compared to the clean and single-slot airfoils. Increasing the slots number is effective up to four slots. The four-slot airfoil improved lift by 15.8%, and the two slots achieved a 22.31% CL/CD increase. Future work could optimize slot geometry, validate findings experimentally, and study dynamic and 3D effects. |
| format | Article |
| id | doaj-art-08786e8bcb444fe0b7d9e2469b6eac42 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-08786e8bcb444fe0b7d9e2469b6eac422025-02-09T12:28:39ZengNature PortfolioScientific Reports2045-23222025-02-0115111810.1038/s41598-025-87000-zMulti-slotted airfoil design for enhanced aerodynamic performance and economic efficiencyMohamed A. Aziz0Mohamed A. Khalifa1M. A. Abdelrahman2Haitham Elshimy3Ahmed M. Elsayed4Mechanical Engineering Department, Faculty of Engineering, Suez UniversityMechanical Engineering Department, Institute of Aviation Engineering and TechnologyMechanical Engineering Department, Faculty of Engineering, Shoubra Faculty of Engineering, Benha UniversitySpace Navigation Department, Faculty of Navigation Science and Space Technology, Beni Suef UniversityMechanical Engineering Department, Faculty of Engineering, Fayoum UniversityAbstract Recently, slotted airfoils have been introduced as a passive flow control approach. The slotted airfoil method resulted in stall delay and enhanced the lift coefficient. The single-slot airfoil is unable to delay stall if the flow is injected downstream of the separation point at the stall angle of attack. A multi-slot airfoil ensures air is injected along the airfoil suction side, delaying stalls over a large range of AOA. The current study focuses on enhancing wind turbine blades’ efficiency by utilizing a novel multi-slot NACA23012C airfoil design as a passive control approach. A numerical study of the optimal grid number was carried out, followed by validating the numerical model with previous experimental results in the literature. The numerical study is followed by a study of the effect of the number of airfoil slots: one, two, three, four, five, and six. The characteristics of the flow field were analyzed to explain the benefit of applying multi-slotted on the aerodynamic performance of an airfoil with a high AOA at Reynolds number 2.74 × 105. The findings showed a significant improvement in the lift coefficient values and the delayed stall AOA for multi-slot airfoils compared to the clean and single-slot airfoils. Increasing the slots number is effective up to four slots. The four-slot airfoil improved lift by 15.8%, and the two slots achieved a 22.31% CL/CD increase. Future work could optimize slot geometry, validate findings experimentally, and study dynamic and 3D effects.https://doi.org/10.1038/s41598-025-87000-zPassive flow controlMulti slotted airfoilWind turbineNACA 23012CNumerical study |
| spellingShingle | Mohamed A. Aziz Mohamed A. Khalifa M. A. Abdelrahman Haitham Elshimy Ahmed M. Elsayed Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency Scientific Reports Passive flow control Multi slotted airfoil Wind turbine NACA 23012C Numerical study |
| title | Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| title_full | Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| title_fullStr | Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| title_full_unstemmed | Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| title_short | Multi-slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| title_sort | multi slotted airfoil design for enhanced aerodynamic performance and economic efficiency |
| topic | Passive flow control Multi slotted airfoil Wind turbine NACA 23012C Numerical study |
| url | https://doi.org/10.1038/s41598-025-87000-z |
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