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EFFECT OF INFLOW CONDITIONS ON CENTRIFUGAL FAN NOISE.

Author(s) : NEISE W., HOPPE G.

Summary

A STUDY IS DESCRIBED TO REDUCE THE NOISE OF A CENTRIFUGAL FAN. TWO DIFFERENT DESIGNS OF THE INLET NOZZLE AT THE IMPELLER EYE WERE INVESTIGATED. THE DESIGN THAT INCORPORATES AN AXIAL RING GAP BETWEEN THE NOZZLE AND THE IMPELLER SHROUD PROVES INFERIOR TO THE DESIGN WITH THE NOZZLE REACHING INTO THE IMPELLER MOUTH. THE PRESENCE OF THE INLET BOX IN THE ABSENCE OF INLET GUIDE CONTROL MEANS LEADS TO UNSTEADY FAN OPERATION DUE TO STEADY AND UNSTEADY SWIRL COMPONENTS GENERATED IN THE INLET BOX. THIS SWIRL CAN BE ELIMINATED BY A SIMPLE SPLITTER PLATE. AS A RESULT, OPERATION OF THE FAN BECOMES SMOOTH AND STEADY, THE AERODYNAMIC FAN PERFORMANCE AND THE FAN EFFICIENCY ARE IMPROVED AND THE NOISE SPECTRUM IS REDUCED.

Details

  • Original title: EFFECT OF INFLOW CONDITIONS ON CENTRIFUGAL FAN NOISE.
  • Record ID : 1987-1919
  • Languages: English
  • Publication date: 1986/11/05
  • Source: Source: Proc. 1st eur. Symp. Air Cond. Refrig., Brussels
    165-172; 7 fig.; 2 ref.
  • Document available for consultation in the library of the IIR headquarters only.

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