Aerodynamic Design , Analysis and Dynamic modelling of a Horizontal axis Micro wind turbine blade using NACA 4412 profile.
Sowmya k, Pavan Badiger, Pavankumar S. P, Yuvaraja K
This project primarily aims to investigate the aerodynamic characteristics of a small Horizontal Axis Wind Turbines (HAWT) with different blade tip configurations to enhance power generation efficiency and NACA 4412 aerofoil is used for turbine blade design, and analysis of wind turbine blade. The chord and twist angle distributions of the preliminary blade design are determined. The preliminary blade design i.e., simple tapered blade does not necessarily provide the best power performance under practical operation conditions and needs to follow further modifications and calculations. The optimization with the objective of enhancement of power performance and low speed starting behaviour is carried out. The optimization plays important role for good starting and low wind performance. In this work analysis is carried out for coefficient of performance of the blade and for starting behaviour of the wind turbine blade. The aerodynamic power and power coefficients curves are drawn for the optimized wind turbine.
The result indicated that the modified design i.e., Twisted-Tapered wind turbine blade gives 41.09% higher power output and 41.89% higher coefficient of power compared to simple tapered blade design at 8m/s of wind velocities. The twisted profile offers better structural stability as compared to simple tapered profile. Compared to simple profile, the total deformation was reduced further by 2.69%, while the equivalent stress was reduced by 1.51%. Comparison of CFD results with experimental results showed a good agreement.