中文摘要：

采用叶片周向倾斜设计法，改变一直叶片小型轴流风扇叶型，得到不同周向倾斜角的小型轴流风扇，并对其内部流场进行定常流动的数值模拟，分析直叶片、前倾斜叶片、后倾斜叶片等风扇叶型对气动性能的影响。模拟结果表明，采用叶片前缘倾斜设计可减弱附面层分离，改善风扇流动状况，从而达到提高风扇静压和效率的目的。

英文摘要：

This study changes the blade profile of a small axial flow fan with straight blades and ob- tains a small axial flow fan with different circumferential tilt angles with the design method of circumferen- tial tilt of blades, conducts numerical simulation of its internal fluid field and analyzes the effect of straight blade, blade with forward tilt and blade with back tilt on aerodynamic performance. The simulated result shows that the design of front edge tilt of blade can weaken boundary layer separation, improve the flow situation of fans and thus realize the purpose of improving static pressure and efficiency of fans.