Co-authors​ :

 Park HYUNBUM (KOREA, REPUBLIC OF), Jeong WOOSEONG (KOREA, REPUBLIC OF) 

Recently, the renewable energy has been widely used as a source of wind energy and solar energy due to the shortage of fossil fuels and environmental problems. The wind power energy is emerging as an important energy source, and the wind power market is showing rapid growth worldwide. In this study, a high-efficiency wind turbine blade was designed with an integrated blade aerodynamic design for prior research on separate blades. The transportation of composite blade of large scale wind turbine requires several considerations. Therefore, the study of detachable blades was conducted in this work. Aerodynamic design and analysis of blades considering on the location of division were performed. In order to design a wind power system, system specifications must be established first, and system specifications can be defined for purpose and detailed design requirements can be established. The most important factor in wind power system design is the design of blades that convert wind energy into mechanical energy. In this study, various airfoil were compared and analyzed by referring to the wind turbine airfoil catalog, and NACA 4418 with maximum lift coefficient, maximum lift ratio, and structural strength guaranteed thickness was selected. In this work, CFD Analysis for validation of aerodynamic performance was performed. The flow analysis was simulated in the same way as the design requirements used in the design, the fluid model used the basic air model in CFX, and the turbulence model applied the SST (Shear Stress Transfer) model based on the highly reliable k-ω model for laminar flow. The target of aerodynamic design result of wind turbine blade is 4.3MW, and as a result of reviewing the numerical analysis results using commercial codes, the error between the design value and the analysis value is about 9%, and the design was verified through analysis.
In this study, aerodynamic design of an integrated blade was carried out as a prior study to establish a separate blade design plan for large-scale wind power generation land transportation, and the target blade was operated at a rated wind speed of 12 m/s and the rated output was selected at 4.3 MW.
When designing aerodynamic forces, NACA 4418 with a relatively thick airfoil thickness was selected for the maximum lift coefficient, maximum lift ratio, and structural strength. The aerodynamic design method was designed with the optimal acceptance angle at the maximum port ratio, and an aerodynamic analysis was performed to verify the aerodynamic design value. In the future, blade structure design and analysis will be performed by reflecting the aerodynamic shape results designed through this study.