An analysis method has been developed for the prediction of flow in a cross-flow fan with a casing. The method has no simplifying assumptions regarding the geometry of either the impeller blades or the casing. Taking into consideration the effect of the boundary layer on the upper wall surface of the casing, the internal flow is analyzed using both the boundary element method and the discrete vortex method by assuming that the flow is two-dimensional, inviscid and incompressible. In order to satisfy Kelvin's theorem, vortices are shed at the trailing edges of each impeller blade. The discrete vortex method is used to approximate the convection of the free vortices. Results are given for the cross-flow fan with two different configurations of the casing with an identical impeller.
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