Hot-Wire Measurements Inside a Centrifugal Fan Impeller

[+] Author and Article Information
A. Kjörk, L. Löfdahl

Department of Applied Thermodynamics and Fluid Mechanics, Chalmers University of Technology, 412 96 Göteborg, Sweden

J. Fluids Eng 111(4), 363-368 (Dec 01, 1989) (6 pages) doi:10.1115/1.3243654 History: Received January 05, 1988; Online October 26, 2009


Measurements of the three mean velocity components and five of the Reynolds stresses have been carried out in the blade passage of a centrifugal fan impeller. The impeller was of ordinary design, with nine backward curved blades, and all measurements were carried out at the design flow rate. The mean velocity measurements show that the flow can be characterized as an attached flow with almost linearly distributed velocity profiles. However, in a region near the suction side close to the shroud a low velocity region is created. From the turbulence measurements it can be concluded that relatively low values of the turbulent stresses are predominating in the center region of the channel. Closer to the walls higher values of the normal as well as shear stresses are noted.

Copyright © 1989 by ASME
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