Title: The effect of a cross-flow opening on the performance of a centrifugal fan in the cleaning section of a combine harvester
Authors: Gebrehiwot, Mekonnen Gebreslasie
De Baerdemaeker, Josse
Baelmans, Martine
Issue Date: 31-Aug-2008
Host Document: Proceedings of CIGR International Conference of Agricultural Engineering
Conference: CIGR INTERNATIONAL CONFERENCE OF AGRICULTURAL ENGINEERING location:Iguassu Falls City - PR - Brazil date:31 August 31 to 4 September
Abstract: Modern harvesting machines are required to meet the increasing needs of capacity and
output under a wide range of field and crop conditions. One of the critical factors to fulfill the current
demand is the capacity of the cleaning fan. In order to obtain an effective cleaning action, the fan has
to generate a forceful and even air flow over and through the complete width of sieves. In this paper, a
forward curved wide centrifugal fan with two parallel outlets is studied numerically and
experimentally for the flow uniformity at the outlets. Computational Fluid Dynamics (CFD) is used to
study the effect of a cross-flow opening on the performance of the centrifugal fan. In addition to the
CFD calculations, velocity profiles are measured at the outlets of the fan; with and without the crossflow
opening using hot-wire anemometry. It is found out that addition of the cross-flow opening has
brought limited effect on the general performance of the fan but plays an important role in having
uniform air flow along the width of the outlets. Comparisons between the simulations and
measurements show generally good agreement, with in +-10%.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Division of Mechatronics, Biostatistics and Sensors (MeBioS)
Applied Mechanics and Energy Conversion Section

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