风洞流场特性分析

Analysis of Flow Characteristics of Wind Tunnel

根据不可压缩流体理论,加载修正后的入口风速表达式,并利用流体仿真软件建立风洞模型,对流场进行仿真分析;通过对比实验数据与仿真结果来验证模型的合理性,并对改进收缩段风洞进行仿真,比较两组风洞的流场品质;通过对流体域入口及出口处气流速度的积分运算,计算出风能利用率的差值。结果表明:改进模型能够进一步提高风洞内空气的流速,增强风能的利用效率。

According to the theory of incompressible fluid,flow field in wind tunnel model was simulated by fluid simulation software after loading revised wind speed formula of entrance.It was proved to be reasonable by comparison of the experimental data and simulation results,modified wind tunnel model was also built and compared.The difference of wind energy utilization rates was obtained by the integral operation of entrance and exit velocity in the fluid domain.All calculated results show that modified model can be used to increase the air flow rate further and improve the wind energy utilization rate.