Abstract
To improve the efficiency of the compact centrifugal blower in the limitation of size, we developed two diffusers. The pressure loss of the return channel bending part accounts for about 20% of the internal flow loss of the blower. For high efficiency of the blower, it is necessary to minimize the pressure loss of the return channel bending part. By comparing the analysis results between original diffuser and developed diffusers using CFD (Computational Fluid Dynamics), it was revealed that the pressure loss of the return channel bending part was reduced up to 31% and the pressure loss of the static channel was reduced up to 4.7%. Furthermore, we confirmed that the amount of rise in static pressure of the blower increased up to 0.7% compared with the original diffuser by an experiment.
