In this paper, 3D flow and performance analysis on the 20㎾ (FIL-20) rotor blade has been carried out by using the 3-D Navier-Stokes commercial solver (CFX-5.7) to provide more efficient design techniques to the HAWT engineers. The rated power and it...
In this paper, 3D flow and performance analysis on the 20㎾ (FIL-20) rotor blade has been carried out by using the 3-D Navier-Stokes commercial solver (CFX-5.7) to provide more efficient design techniques to the HAWT engineers. The rated power and its approaching wind velocity at design point (TSR=6) are 20㎾ and 10㎧ respectively. The rotor diameter is 10.1m and the rotating speed is 90.5rpm. Airfoils such as S-809 consist of the rotor blade from hub to tip. Recent CFX version, 5.7 was adopted to simulate 3-D flow field and to analyze the performance characteristics of the rotor blade. Entire mesh node number is about 730,000 and it is generated by ICEM-CFD to achieve better mesh quality. Approaching to the root, the inflow angle becomes large, which causes the blade to be stalled in the region. Therefore, k-ω SST turbulence model was used to predict the quantitative flow information more accurately. The predicted maximum power occurring at the design tip speed ratio is 21.7㎾. Application of commercial CFD code to optimum blade design and performance analysis was proved to be more effective environment to HAWT blade designers.