1. 1. Horizontal Wind Turbine Anas Aljunaidi MECH 408 Greg Watkins, Ph.D., PE
2. 2. Background Analyze loads on wind Turbine Run CFD on single and wind turbine farms
3. 3. Introduction 1430 Steel 1430 Steel
4. 4. Material US Department of Energy
5. 5. CFD Boundary Conditions - External - Speed Wind12 m/s
6. 6. Forces on Wind Turbine
7. 7. Wind Turbine Geometry
8. 8. Wind speed Analysis Area Swept by the Blades= pi x Radius = 850in 2 = 2.3106 in 2 =2,300,000 square inch = 1,483.8 m 2 .
9. 9. Force from Wind Total Dynamic Pressure= *rhu*V^2 = 1 2 1.2754 3 12 2 = 92 2 Total force exerted = Pressure*Swept Area of Blades 92 2 1,483.8 2 = 136,436 N= 30,672.033 pounds force Rhu= Air density at 20 C , 101.325 kPa
10. 10. Static Result Fix 0.023 N/m^2 295,892 N/m^2
11. 11. Static Result 0.674mm 0.0 mm
12. 12. Drag 0.457m
13. 13. Calculation Fd= 1 2 0.04 1.2754 21.6 0.457 12 2 = 36.2 N Assumptions: Area= Square 21.6 m 0.457
14. 14. Left force 1.9 m L A
15. 15. Calculation o FL= 1 2 0.42 1.2754 21.6 0.457 12 2 = 1,582 N Assumptions: Area= Square 21.6 m 1.9 m
16. 16. Solid Works Output turbine assem.SLDASM [Project(1) [Default]] Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In Convergence Delta Criteria SG Normal Force (X) 1 [N] 181.5529246 185.752925 181.5529246 188.3778656 100Yes 6.824940997 9.929729303 SG Normal Force (Y) 1 [N] 199.0358555 198.0729076 193.9113958 208.0525651 100Yes 14.14116922 15.65210745 Iterations: 45 Analysis interval: 22
17. 17. Total Power Power = 1 2 3 P = Power (Watts) = Air Density (about 1.275 kg/m3 at sea level) A = Swept Area of Blades (m2) V = Velocity of the wind
18. 18. Total Power Power = 1 2 3 = 1 2 1.275 3 1,483.8 2 12 3 = 1.63 106 = 1.63 Turbine
19. 19. Natural Frequency
20. 20. Animation
21. 21. Spacing in Wind farms D=43 m 4D=172 m 7D=301 m
22. 22. Wind Farms 81 m 54 m
23. 23. Pressure Plot 101.326KPa 101.326KPa
24. 24. 3-D Pressure
25. 25. Velocity
26. 26. 3-D Velocity
27. 27. Solid Works Output turbine assem.SLDASM [Project(1) [Default]] Goal Name Unit Value Averaged Value Minimum Value Maximum Value Progress [%] Use In Convergence Delta Criteria PG Static Pressure 1 [Pa] 101325.1562 101325.1548 101325.1521 101325.1562 100 Yes 0.004078979 0.022376443 PG Velocity 1 [m/s] 12.02177676 12.02160023 12.02140063 12.02177676 100 Yes 0.000376126 0.001988448 PG Mach Number 1 [ ] 0.035031718 0.035031203 0.035030622 0.035031718 100 Yes 1.09655E-06 5.79546E-06 PG Static Pressure 2 [Pa] 101311.9506 101312.1532 101311.822 101312.5168 100 Yes 0.610094113 1.996318653 Iterations: 60 Analysis interval: 21