Variable pitch axial flow fans are widely used in industrial applications to satisfy variable operating conditions. The change of the blade pitch leads to a different rotor geometry and has a major influence on the unsteady operation of the machine. In this work, an experimental research on an axial flow fan with variable pitch blades has been carried out. First of all, the fan performance curves has been obtained. Then the flow field has been measured at ten radial locations both at the inlet and exit rotor plane using hot wire anemometry. Velocity components and total unsteadiness were determined and analyzed in order to characterize the influence of pitch blade and operating conditions on the flow structure.
Total Unsteadiness Downstream of an Axial Flow Fan With Variable Pitch Blades
Contributed by the Fluids Engineering Division of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the Fluids Engineering Division November 3, 2000; revised manuscript received September 10, 2001. Associate Editor: Y. Tsujimoto.
Velarde-Sua´rez , S., Ballesteros-Tajadura , R., Santolaria-Morros , C., and Blanco-Marigorta , E. (September 10, 2001). "Total Unsteadiness Downstream of an Axial Flow Fan With Variable Pitch Blades ." ASME. J. Fluids Eng. March 2002; 124(1): 280–283. https://doi.org/10.1115/1.1427926
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