Effect of sickle shaped blades on sound generated by axial flow fans

  • K.-O. Felsch
  • W. Stütz
Chapter
Part of the Acta Mechanica book series (ACTA MECH.SUPP., volume 4)

Summary

In this paper the point in question is whether fan noise reduction is possible by means of sickleshaped blades. Lighthill’s extended acoustic analogy is used to verify this effect. For the special case of the aeroacoustic interaction between an radiator and an impeller, numerical and measured results are compared and discussed. The noise reduction using the forward sickled fan is substantial in comparison with the sound generated by a conventionally shaped fan. The numerical calculations and the experimental results show the same tendencies as well for the sound power level as for the spectrum.

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References

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Copyright information

© Springer-Verlag 1994

Authors and Affiliations

  • K.-O. Felsch
    • 1
  • W. Stütz
    • 2
  1. 1.Institut für Strömungslehre und Strömungsmaschinen Abteilung StrömungsmaschinenUniversität Karlsruhe (TH)KarlsruheGermany
  2. 2.Ziehl Abegg GmbH & Co. KGKünzelsauFederal Republic of Germany

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