轴流风机的理论与实验研究

Theoretical and Experimental Study of Axial Flow Fans

对03—11型结构的风机进行了理论分析与实验测试,发现在轮轂后存在一个较大的涡流区,流体在这儿发生分离,叶片根部白白地消耗了动力,并使流动恶化,效率降低。改进了风机结构设计后,经测定可使风机效率提高2.8％,并给出了改进前后的无量纲特性曲线。

Theoretical and experimental study were made of the present axial flow fans,finding a vortex area behind the hub and a flow separation there which reduces the effeciency of fans.Based on the study an improvement is made and the effeciency is raised by 2.8%.The dimen-sionless characteristic curves both before and after the improvement are given out in this paper