Effects of Tip Clearance and Impeller Eccentricity on the Aerodynamic Performance of Mixed Flow Fan

The tip clearance and eccentricity of the impeller will affect aerodynamic performance fan, installation vibration characteristics are relatively highly required if is too small. A reasonable excellent coaxially necessary to ensure that does not rub with shell has superior when fan working. In current study, a mixed flow was taken as object experimental explorations were performed on C-type test rig designed according GB/T1236 2000 Industrial fans-performance testing using standardized airways. By moving airways change clearance, it found an overlarge made efficiency decrease significantly, gradient large. However, became smaller reaching certain clearance. Similarly, larger, also decreased. To explore influence optimal fan’s performance, numerical simulations field inside carried out FLUENT software corresponding conditions. revealed from energy leakage perspective. Through theoretical analysis, we try provide guidance design, commissioning