Effect of Airfoil Concavity on Wind Turbine Blade Performances
Although the optimization of wind turbine blade aerodynamic performance has achieved fruitful results, whether airfoil concavity, an important method for preventing flow separation, is also feasible for improving the aerodynamic performance has not been confirmed scientifically. Thus, we selected th...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2019-01-01
|
| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/6405153 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849397850804322304 |
|---|---|
| author | Jianlong Ma Yafan Duan Ming Zhao Wenchun Lv Jianwen Wang Qilao Meng Ke Yongfeng Ren |
| author_facet | Jianlong Ma Yafan Duan Ming Zhao Wenchun Lv Jianwen Wang Qilao Meng Ke Yongfeng Ren |
| author_sort | Jianlong Ma |
| collection | DOAJ |
| description | Although the optimization of wind turbine blade aerodynamic performance has achieved fruitful results, whether airfoil concavity, an important method for preventing flow separation, is also feasible for improving the aerodynamic performance has not been confirmed scientifically. Thus, we selected the blade of a small horizontal-axis wind turbine as a research model and proposed an optimization method based on airfoil concavity near the trailing edge of the blade suction surface. The experimental results showed that airfoil concavity improved blade aerodynamic performance by 3–15%. Subsequently, its effects on the sound pressure level within the wake flow field were investigated using an acoustic array, and the results suggested that the sound pressure level was reduced by 9.6–15.8%. Lastly, a modal test of the rotor blade was conducted. Although the natural frequencies of the 1st and 2nd order vibrations had hardly changed, their vibrational stiffness were increased by 7 and 4.9%, respectively, which indicated that airfoil concavity significantly improved structural robustness. |
| format | Article |
| id | doaj-art-a705827b1fac445facd6ef1975a02ad8 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-a705827b1fac445facd6ef1975a02ad82025-08-20T03:38:49ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/64051536405153Effect of Airfoil Concavity on Wind Turbine Blade PerformancesJianlong Ma0Yafan Duan1Ming Zhao2Wenchun Lv3Jianwen Wang4Qilao Meng Ke5Yongfeng Ren6School of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Mechanical Engineering, Tianjin University, Tianjin 300072, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaSchool of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot 010051, ChinaAlthough the optimization of wind turbine blade aerodynamic performance has achieved fruitful results, whether airfoil concavity, an important method for preventing flow separation, is also feasible for improving the aerodynamic performance has not been confirmed scientifically. Thus, we selected the blade of a small horizontal-axis wind turbine as a research model and proposed an optimization method based on airfoil concavity near the trailing edge of the blade suction surface. The experimental results showed that airfoil concavity improved blade aerodynamic performance by 3–15%. Subsequently, its effects on the sound pressure level within the wake flow field were investigated using an acoustic array, and the results suggested that the sound pressure level was reduced by 9.6–15.8%. Lastly, a modal test of the rotor blade was conducted. Although the natural frequencies of the 1st and 2nd order vibrations had hardly changed, their vibrational stiffness were increased by 7 and 4.9%, respectively, which indicated that airfoil concavity significantly improved structural robustness.http://dx.doi.org/10.1155/2019/6405153 |
| spellingShingle | Jianlong Ma Yafan Duan Ming Zhao Wenchun Lv Jianwen Wang Qilao Meng Ke Yongfeng Ren Effect of Airfoil Concavity on Wind Turbine Blade Performances Shock and Vibration |
| title | Effect of Airfoil Concavity on Wind Turbine Blade Performances |
| title_full | Effect of Airfoil Concavity on Wind Turbine Blade Performances |
| title_fullStr | Effect of Airfoil Concavity on Wind Turbine Blade Performances |
| title_full_unstemmed | Effect of Airfoil Concavity on Wind Turbine Blade Performances |
| title_short | Effect of Airfoil Concavity on Wind Turbine Blade Performances |
| title_sort | effect of airfoil concavity on wind turbine blade performances |
| url | http://dx.doi.org/10.1155/2019/6405153 |
| work_keys_str_mv | AT jianlongma effectofairfoilconcavityonwindturbinebladeperformances AT yafanduan effectofairfoilconcavityonwindturbinebladeperformances AT mingzhao effectofairfoilconcavityonwindturbinebladeperformances AT wenchunlv effectofairfoilconcavityonwindturbinebladeperformances AT jianwenwang effectofairfoilconcavityonwindturbinebladeperformances AT qilaomengke effectofairfoilconcavityonwindturbinebladeperformances AT yongfengren effectofairfoilconcavityonwindturbinebladeperformances |