Numerical Study of the Effect of Blade Inward Inclines on the Performance of Darrieus Vertical Turbines as a Wave Energy Converter (WEC)
DOI:
https://doi.org/10.33863/cmea.v8i1.3953Keywords:
Computational Fluid Dynamic (CFD), Darrieus Turbine, Blade Inward Inclined Angle, Coefficient of Power (CP), Coefficient of Torque (CT)Abstract
This study investigates the effect of blade inward inclined angle on the performance of a Darrieus vertical turbine as a wave energy converter (WEC). Numerical simulations were conducted using a Computational Fluid Dynamics (CFD) approach with OpenFOAM software, utilizing the interFoam model to represent the interaction between fluid flow and turbine structure. Variations were made at a blade inclination angle of 5° and Tip Speed Ratio (TSR) of 0.2 to 0.5. The simulation results show that the increase in TSR is directly proportional to the increase in torque coefficient (CT) and power coefficient (CP), which means that the turbine performance is more efficient in absorbing wave energy. Flow visualization using vorticity and Q-criterion shows vortex shedding at the trailing edge of the blades, which affects the turbine efficiency. The turbine design with an inclination angle of 5° was shown to improve the conversion of energy into rotational mechanical power, making it a promising alternative in sustainable ocean energy utilization.
