Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations
The continuous increase in wind turbine blade length raises a serious question about how to effectively reduce the blade mass. As one of the solutions, recently, some wind turbine manufacturers are moving towards longer blades with thicker airfoils. As most of the numerical simulation experiences ar...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-10-01
|
| Series: | Atmosphere |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4433/13/11/1804 |
| _version_ | 1797469152105988096 |
|---|---|
| author | Zhenye Sun Rongkun Shi Weijun Zhu Xiaochuan Li Junwei Yang |
| author_facet | Zhenye Sun Rongkun Shi Weijun Zhu Xiaochuan Li Junwei Yang |
| author_sort | Zhenye Sun |
| collection | DOAJ |
| description | The continuous increase in wind turbine blade length raises a serious question about how to effectively reduce the blade mass. As one of the solutions, recently, some wind turbine manufacturers are moving towards longer blades with thicker airfoils. As most of the numerical simulation experiences are based on thin airfoils, the present paper focused on airfoils with thickness to chord ratios of 30% and specifically focused on the influence of spanwise length on the numerical results. Airfoils with a spanwise length of 0.1 to 5 chords were simulated utilizing the Delayed Detached-Eddy Simulations (DDES) approach. One of the important objectives was to identify the necessary grid resolution and configuration while still maintaining accuracy under a deep stall situation. It was found that the spanwise length of the computational domain had a crucial influence on the prediction of lift and drag. At a stall angle of attack, the aerodynamic force could not be accurately predicted when the airfoil span was reduced to 0.3 chords, even with a high grid density. The periodicity of the spanwise flow was clearly visible when the airfoil span was extended to 5 chords. |
| first_indexed | 2024-03-09T19:17:24Z |
| format | Article |
| id | doaj.art-aa0460c92c194d20b07c81dfbc1f9573 |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T19:17:24Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-aa0460c92c194d20b07c81dfbc1f95732023-11-24T03:42:29ZengMDPI AGAtmosphere2073-44332022-10-011311180410.3390/atmos13111804Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy SimulationsZhenye Sun0Rongkun Shi1Weijun Zhu2Xiaochuan Li3Junwei Yang4School of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaSchool of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaSchool of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaSchool of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaSchool of Electrical, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, ChinaThe continuous increase in wind turbine blade length raises a serious question about how to effectively reduce the blade mass. As one of the solutions, recently, some wind turbine manufacturers are moving towards longer blades with thicker airfoils. As most of the numerical simulation experiences are based on thin airfoils, the present paper focused on airfoils with thickness to chord ratios of 30% and specifically focused on the influence of spanwise length on the numerical results. Airfoils with a spanwise length of 0.1 to 5 chords were simulated utilizing the Delayed Detached-Eddy Simulations (DDES) approach. One of the important objectives was to identify the necessary grid resolution and configuration while still maintaining accuracy under a deep stall situation. It was found that the spanwise length of the computational domain had a crucial influence on the prediction of lift and drag. At a stall angle of attack, the aerodynamic force could not be accurately predicted when the airfoil span was reduced to 0.3 chords, even with a high grid density. The periodicity of the spanwise flow was clearly visible when the airfoil span was extended to 5 chords.https://www.mdpi.com/2073-4433/13/11/1804Delayed Detached-Eddy Simulation (DDES)thick airfoilwind turbinesaerodynamicsspanwise length |
| spellingShingle | Zhenye Sun Rongkun Shi Weijun Zhu Xiaochuan Li Junwei Yang Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations Atmosphere Delayed Detached-Eddy Simulation (DDES) thick airfoil wind turbines aerodynamics spanwise length |
| title | Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations |
| title_full | Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations |
| title_fullStr | Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations |
| title_full_unstemmed | Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations |
| title_short | Accurate Stall Prediction for Thick Airfoil by Delayed Detached-Eddy Simulations |
| title_sort | accurate stall prediction for thick airfoil by delayed detached eddy simulations |
| topic | Delayed Detached-Eddy Simulation (DDES) thick airfoil wind turbines aerodynamics spanwise length |
| url | https://www.mdpi.com/2073-4433/13/11/1804 |
| work_keys_str_mv | AT zhenyesun accuratestallpredictionforthickairfoilbydelayeddetachededdysimulations AT rongkunshi accuratestallpredictionforthickairfoilbydelayeddetachededdysimulations AT weijunzhu accuratestallpredictionforthickairfoilbydelayeddetachededdysimulations AT xiaochuanli accuratestallpredictionforthickairfoilbydelayeddetachededdysimulations AT junweiyang accuratestallpredictionforthickairfoilbydelayeddetachededdysimulations |