UNSTEADY FLOW ANALYSIS IN A CROSS-FLOW FAN WITH A CASING  

作　　者：Chen Cichang(Jiangsu University of Science and Technology) 

出　　处：《Chinese Journal of Mechanical Engineering》1995年第3期228-237,243,共17页中国机械工程学报（英文版）

摘　　要：A numerical analysis method has been developed for the prediction of the flow in across-flow fan with a casing. The method has no simplifying assumptions regarding the geometryof both the impeller blades and the casing Taking into consideration the effect of the boundarylayer on the upper wall surface of the casing, the internal flow is analyzed using both the directboundary element method and the discrete vortex method by assuming that the flow istwo-dimensional. inviscid and incomtressible. In order to satisfy Kelven's theorem, vorticity is sh-ed at the trailing edges of each impeller blade, then the discrete vortex method is used to approxi-mate the convection of the free vorticity. Results are giver for the cross-flow fan with two differ-ent configurations of the casing with an dentical impeller.A numerical analysis method has been developed for the prediction of the flow in across-flow fan with a casing. The method has no simplifying assumptions regarding the geometryof both the impeller blades and the casing Taking into consideration the effect of the boundarylayer on the upper wall surface of the casing, the internal flow is analyzed using both the directboundary element method and the discrete vortex method by assuming that the flow istwo-dimensional. inviscid and incomtressible. In order to satisfy Kelven's theorem, vorticity is sh-ed at the trailing edges of each impeller blade, then the discrete vortex method is used to approxi-mate the convection of the free vorticity. Results are giver for the cross-flow fan with two differ-ent configurations of the casing with an dentical impeller.

关 键 词：Cross-flow fan Unsteady flow 

分 类 号：TH44[机械工程—机械制造及自动化]