OPTIMIZING AERODYNAMIC PERFORMANCE OF H-DARRIEUS VAWTS: A COMPUTATIONAL FLUID DYNAMICS APPROACH
Keywords:
H-Darrieus VAWT, Computational Fluid Dynamics, NACA0015 Airfoil, Tip Speed Ratio, Aerodynamic Optimization, Flow Separation, Dynamic Stall, Wind Turbine Efficiency, Renewable Energy, Blade DesignAbstract
This study investigates the aerodynamic performance optimization of a three-bladed H-Darrieus Vertical Axis Wind Turbine (VAWT) using Computational Fluid Dynamics (CFD) simulations, with a focus on the NACA0015 airfoil. The analysis was conducted across various Tip Speed Ratios (TSRs) and wind speeds to identify optimal operating conditions. The results revealed that the turbine achieves maximum efficiency at a TSR of approximately 3.0, where the power coefficient (Cp) reaches its peak. The NACA0015 airfoil demonstrated a balanced lift-to-drag ratio, contributing to consistent performance across a range of conditions. The study also highlighted the impact of dynamic stall and flow separation on turbine efficiency, particularly at lower and higher TSRs. Validation against experimental data confirmed the reliability of the CFD model, with minor discrepancies attributed to the limitations of 2D simulations. The findings provide valuable insights for the design and optimization of H-Darrieus VAWTs, emphasizing the importance of TSR management, airfoil design, and turbulence control for maximizing efficiency.
References
Bianchini, A., Ferrara, G., Ferrari, L., & Magnani, S. (2011). Aerodynamic performance optimization for a Darrieus vertical axis wind turbine. Renewable Energy, 42, 29-39.
Ferreira, C. S., van Bussel, G. J., & van Kuik, G. A. (2009). Wind tunnel hot-wire measurements of dynamic stall on a vertical axis wind turbine. Experiments in Fluids, 46(1), 97-108.
Islam, M., Ting, D. S., & Fartaj, A. (2008). Aerodynamic models for Darrieus-type straight-bladed vertical axis wind turbines. Renewable and Sustainable Energy Reviews, 12(4), 1087-1109.
Menter, F. R. (1994). Two-equation eddy-viscosity turbulence models for engineering applications. AIAA Journal, 32(8), 1598-1605.
Möllerström, E., Hylander, J., & Andersson, L. (2019). Computational fluid dynamics simulation and analysis of a vertical axis wind turbine. Energy Science & Engineering, 7(3), 747-758.
Paraschivoiu, I. (2002). Wind turbine design: with emphasis on Darrieus concept. Polytechnic International Press.
Sheldahl, R. E., & Klimas, P. C. (1981). Aerodynamic characteristics of seven symmetrical airfoil sections through 180-degree angle of attack for use in aerodynamic analysis of vertical axis wind turbines. Sandia National Laboratories.
Sørensen, J. N. (2011). Aerodynamic aspects of wind energy conversion. Annual Review of Fluid Mechanics, 43, 427-448.
Tjiu, W., Marnoto, T., Mat, S., Ruslan, M. H., & Sopian, K. (2015). Darrieus vertical axis wind turbine for power generation I: Assessment of Darrieus VAWT configurations. Renewable Energy, 75, 50-67.
Downloads
Published
Issue
Section
License
Copyright (c) 2024 Mirza Tauqeer Ahmed, Dr. Afroz Mehar, Dr. M. Subburaj (Author)
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.