微型风力机叶片结构优化设计与仿真分析

Optimization Design and Simulation Analysis of Micro-Scale Wind Turbine Blades Structure

针对目前风力机对低速风力资源的利用较少,设计了一种适用于低风速的微型风力机叶片。采用Wilson设计方法建立了以叶片形状参数安装角和弦长为设计变量的数学模型,通过Matlab编写程序计算3W风力机叶片参数并对设计变量做线性优化以利于工程加工。在得到参数的基础上基于点的坐标几何变换理论建立叶片三维模型,并利用Fluent仿真,仿真结果表明叶片的功率为2.91W,与设计额定功率相差3%,满足工程误差。通过此方法设计的微型风力机叶片能获得较高的精度,满足工程要求,为实际生产提供数据支撑。

Aiming at the less use of low-speed wind resources, it gives a design of micro-scale wind turbine blades .for low wind speed. The mathematical model of a rotor blade has been worked out based on Wilson theory and the design variables are the twist angle and the chord length, and this subject heu adopted Maflab as tools to write for the 3W blade design calculation program, to obtain parameters, then optimization of the design variables for engineering procesing.The 3D model is drawn based on the point of the geometry of the coordinate transformation theory, and simulated by Fluent.The simulation results show that the power of the blade is 2.91W, comp -aring with the rated power,and the result is less 3% to meet the engineering errors.The design of micro-scale wind turbine, blades by this method can obtain higher accuracy to meet the project requirements and provide data support for the actual production.