Abstract
To improve working performance of small axial flow fan, a new improved structure was proposed "numerical computation carried out for two sets of fan models using RNG k-e model. The results indicats that the improved models of the two sets have the same trend in static characteristics and flow distribution. Conclusions are as follows: (1) The improved results is satisfactory in static chateristics and efficiency. (2) After the structure improvement, the condition of blade tips separation vortex has been improved greatly, and velocity distributing more uniformly along radial. (3) The structure improvement results in the increase of turbulent intensity, which enables energy losses be reduced, hence, static characteristics and efficiency can be improved.