The Numerical Simulation for the Wind Turbine Blade Aerodynamic Performance

• Main Authors: Hui-Lin Chang, 張惠琳
• Other Authors: Ping-Huey Tang
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/54211146962828199651

碩士 === 遠東科技大學 === 機械研究所 === 97 === Recent Year, as the issue raise of global warming, the conscious of environmental protection has become obvious. The wind power generator module that converts the wind power into electricity has being noted; the aerodynamic characteristic of the impeller of the wind turbine of the wind power generator has become an important study. The Computational Fluid Dynamics (CFD) simulation technology is built on fluid dynamics and numerical computation methods; the numerical simulation technology is a power tools to describe the flow field of conservation issues; it’s widely use and is covering various topics. Due to the aerodynamics flow of the wind turbine is complex but is the key factor for power conversion; this thesis addresses the usage of the commercial packaged software Fine/Turbo to simulate and understand the aerodynamic characteristic of the NREL Phase VI wind blade. Analyzing the Navier – Stock equations and apply an accelerated convergence technology of multi-grid with a time marching method and simulating different inlet flow velocity to k-ε and Spalart-Allmaras on two different turbulence model to analysis the aerodynamic performance of the blade; compare with the experiment test data which is measuring in NASA Ames 24.4m × 36.6m section area wind tunnel, to verify the accuracy of the numerical simulation. The subject of this study in on the NREL Phase VI wind turbine; the rate power is 20kW, revolution of 72 RPM, 2 pieces of the S809 respectively type of blades, a 10 m in rotor diameter, referencing the experiment data based on the flow velocity of 7m/s、13m/s、15m/s、20m/s and simulate the aerodynamic characteristic of the blade under various wing span of section 30%、47%、63%、80%、95% to measure the pressure coefficient distribution, turbulent viscosity, entropy distributions from different numerical simulation of the Chantilly to flow velocities blade surface static pressure, streamline and different inflow of effective power figure. In turn to confirm that the mechanism of aerodynamic stalls and causes affecting the performance of the Blade. This thesis used CFD simulation technology and experiment data mutual authentication on the accuracy of the wind turbine performance simulation results. The result shows that at 72 RPM, the flow velocity of 7m/s, the output power at its minimum yet the power coefficient is the maximum; the valid wind energy interception rate Cp is 0.36. The simulation result shows the aerodynamic performance under low flow velocity matches the experiment data. This proved that feasible study of the numerical simulation technology for the design of aerodynamic characteristic of the wind turbine.