Numerical Research Of 3D Aerodynamic Performance Of Wind Turbine Blades

An accurate understanding about the aerodynamic characteristics of wind turbine blades can offer guidance on the design of wind turbine blades. Aiming at this subject, the essay probes for the effects of different turbulence models and near-wall treatment have made on the numerical simulation of the fluid field around a wind turbine blade. A three dimensional numerical simulation is carried on to imitate the fluid field around the NREL Phaseâ…¥wind turbine blade. In addition, some advice is offered on how to improve the aerodynamic characteristics of the Phaseâ…¥blade. The content and conclusion of the research are following:Finite volume method and SIMPLE method were used. The influence of the size of computational domain on the accuracy of numerical computation was researched, and a suitable computational domain was reaped. The possibility of using wall functions to simulating the fluid field around wind turbine blades with different turbulence model was researched, and the conclusion proved that wall functions can't simulate the fluid field correctly, especially in the stall developing stage. Another method has been tried to imitate the fluid in boundary layer using low-Reynolds method. The SST model was used in the simulating, and the result was compared with the experiment result to prove the accuracy of this method.The aerodynamic characteristics of the Phaseâ…¥blade was analyzed, and a new way of improving the aerodynamic characteristics of wind turbine blades was put forward. the Phaseâ…¥blade was improved by using this method, and the result showed the aerodynamic characteristics of the new blade was better than that of the old one.