基于CFD新型多层锯齿边缘扇叶优化

Optimization of Multilayer Serrated Edges Based on CFD

针对现有家用电风扇扇叶风电转化效率低、风速小和边缘紊流大的问题,在讨论现有多种扇叶结构的基础上,提出了一种新型多层锯齿边缘的扇叶结构,采用Inventor软件进行参数建模,通过正交实验法设计多组实验,基于CFD方法运用Gambit划分网格,采用Fluent进行三维流场数值仿真,获得每组扇叶模型的流量、速度和边缘紊流分布情况。通过多组对比优化实验,获得了一种新型多层锯齿边缘扇叶模型,并采用3D打印进行快速制造原型样机实验。实验结果表明,该风扇扇叶具有风电转化效率高、风速大而均匀、边缘紊流较少等优点。

The domestic electric fans have some problems,which are the low conversion efficiency from wind to electricity of the blades,the small and concentrated wind speed,and the big edge turbulence. Computational fluid dynamics（ CFD） analysis was performed to discuss the existing varieties of fan blade structures and provide a fan blade structure with multilayer jagged edges. Software Inventor was employed to construct the parameters model. Gambit was used to divide grids based on CEF method and Fluent was applied to 3D flow field simulation in the orthogonal experiments. The distribution of flow,speed and edge turbulence of each fan blade was then obtained. A new multilayer jagged fan blade model was achieved through several comparison experiments. And a physical model printing by 3D technology was obtained for testing. The experimental results show that wind power of this fan has the advantages of high conversion efficiency,high and uniform speed,and less edge turbulence.