Abstract

ZAREA, Stefan  and  MARVAL, Juan Pedro. Velocity profiles around of the comfort centrifugal fan. Rev. Fac. Ing. UCV [online]. 2008, vol.23, n.2, pp.55-70. ISSN 0798-4065.

The components of air flow velocity in inlet and outlet of a centrifugal fan without volute were measured with a hot wire anemometer, in controlled conditions. The centrifugal fan, provided with grill and pedestal, was placed in an isolated space of exterior air draught. The measures of axial, radial and tangential velocities were made on a horizontal plane that cut the fan symmetrically by the shaft. The results are shown in 13 graphs, in two forms: Dimensionless Velocity Curves in function of dimensionless distance with regard to the fan and isovelocity curves. The axial velocity profile on the suction is approximately symmetrical with regard to the axis of the fan. The radial and tangential velocities were of same order of magnitude. The parameters that characterize the cuasi-radial jet discharge and the suction flow were calculated.

Keywords : Velocity profile; Vortex flow; Centrifugal fan; Anemometer; Hot wire.