Proceedings of VDI-MEG conference of agricultural engineering issue:Nr.2060 pages:387-392
67th conference LAND TECHNIK – AgEng 2009 location:Hannover date:6-7 november 2009
Computational Fluid Dynamics (CFD) and measurements using hot-wire anemometers are used to study the flow configuration and performance of a cross-flow fan (CFF) used for grain cleaning. Moreover, four CFFs with the same rotor and casing but different vortex wall positions are studied using CFD. Special attention was paid on the effect of the vortex wall position on the performance of the fan and on achieving a balanced air flow division between the two outlets. It has been demonstrated that the two-dimensional CFD model predicts the fan performance upto an acceptable level. Moreover, it is shown that the position of the vortex wall plays a crucial role for the performance of the CFF in general, in particular the airflow division between the two outlets. A more uniform air division is obtained by the changes made to the position of the vortex wall. It is observed that the mass flow rate division between the two outlets can be largely influenced by the rotor outlet opening.