Int J Performability Eng ›› 2018, Vol. 14 ›› Issue (12): 3098-3108.doi: 10.23940/IJPE.18.12.P19.30983108
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Junxi Bia, Chenglong Zhenga*(
), Hongzhong Huangb*(), Yan Zhouc, and Xiaoxue Lid
Revised on
;
Accepted on
Contact:
Zheng Chenglong,Huang Hongzhong
E-mail:574346498@qq.com;hzhuang@uestc.edu.cn
Junxi Bi, Chenglong Zheng, Hongzhong Huang, Yan Zhou, and Xiaoxue Li. Load Analysis and Calculation Optimization of Horizontal Axis Wind Turbine Blades [J]. Int J Performability Eng, 2018, 14(12): 3098-3108.
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Table 1
The provinces with abundant wind energy resources and its wind energy resources in China"
| Province | Wind energy resources(MW) |
|---|---|
| Inner Mongolia | 61780 |
| Xinjiang | 34330 |
| Heilongjiang | 17230 |
| Gansu | 11430 |
| Jilin | 6380 |
| Hebei | 6120 |
| Liaoning | 6060 |
| Shandong | 3940 |
| Jiangxi | 2930 |
| Jiangsu | 2380 |
| Guangdong | 1950 |
| Zhejiang | 1640 |
| Fujian | 1370 |
| Hainan | 640 |
Figure 1
The wind turbine blade structure"
Table 2
Blade description"
| r(m) | Torsion angle (o) | Chord length (m) |
|---|---|---|
| 4.5 | 20.00 | 1.630 |
| 5.5 | 16.30 | 1.597 |
| 6.5 | 13.00 | 1.540 |
| 7.5 | 10.05 | 1.481 |
| 8.5 | 7.45 | 1.420 |
| 9.5 | 5.85 | 1.356 |
| 10.5 | 4.85 | 1.294 |
| 11.5 | 4.00 | 1.229 |
| 12.5 | 3.15 | 1.163 |
| 13.5 | 2.60 | 1.095 |
| 14.5 | 2.02 | 1.026 |
| 15.5 | 1.36 | 0.955 |
| 16.5 | 0.77 | 0.881 |
| 17.5 | 0.33 | 0.806 |
| 18.5 | 0.14 | 0.705 |
| 19.5 | 0.05 | 0.545 |
| 20.3 | 0.02 | 0.265 |
Figure 2
The velocity and force of blade flow"
Table 3
Basic parameters of blades"
| Power | P=1.5MW |
|---|---|
| The rated wind speed | V=10m/s |
| Aerofoil | NACA4412 series |
| Blade length | R=3.2m |
| Blade number | B=3 |
| Rated speed | n=20r/min |
| Cut - in wind speed | V1=4m/s |
| Cut - out wind speed | V2=25m/s |
| Air density | 1.225kg/m3 |
Table 4
Experimental load data"
| No. | The wind speed (m/s) | Blade loading (KN) |
|---|---|---|
| 1 | 5 | 40.44 |
| 2 | 10 | 241.56 |
| 3 | 20 | 220.23 |
| 4 | 30 | 194.98 |
| 5 | 40 | 162.45 |
Figure 3
Comparison of calculation load and experimental load"
Figure 4
Comparison of calculated load and experimental load after modification"
Table 5
Experimental torque data"
| No. | Thewind speed (m/s) | The torque of the blade (KN·m) |
|---|---|---|
| 1 | 5 | 170.26 |
| 2 | 10 | 732.12 |
| 3 | 20 | 645.17 |
| 4 | 30 | 601.57 |
| 5 | 40 | 565.28 |
Figure 5
Comparison of calculation torque and experimental torque"
Figure 6
Comparison of calculated torque and experimental torqueafter modification"
Figure 7
The relationship between output power and speed of wind turbine"
Table 6
The function relation between utilization coefficient of wind energy and axial induction factor"
| α | Cp |
|---|---|
| 0.0 | 0.000 |
| 0.1 | 0.324 |
| 0.2 | 0.512 |
| 0.3 | 0.588 |
| 0.4 | 0.576 |
| 0.5 | 0.500 |
| 0.6 | 0.384 |
| 0.7 | 0.252 |
| 0.8 | 0.128 |
| 0.9 | 0.036 |
| 1.0 | 0.000 |
Figure 8
Utilization coefficient of wind energy at different drift angles of wind turbines"
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