2Zhao Yu, Songli, Wenqi He, Weixiong Wang, Donglao Huang, Zhichi Zhu., “Numerical Simulation of Flow Field for a Whole Centrifugal Fan and Analysis of the Effects of Blade Inlet Angle and Impeller Gap” [J],HVAC&R Research, 2004, 11 ( 2 ) : 263-283.
3Eck B., FANS. design and operation of centrifiigal, axial-flow and cross-flow fans [ M ]. Oxford Pergamon Press, 1973.