Reduction of the Noise Level in Centrifugal Fans by Means of Transition Meshes (Snizhenie Vozdushnogo Shuma v Tsentrobezhnykh Ventilyatorakh Setchatymi Turbulizatorami)

Abstract

The spectral composition of the noise from centrifugal fans contains intensive components precisely in that part of the spectrum where the human ear has the highest sensitivity (500 - 2000 Hz). For this reason, the use of centrifugal fans in rooms with personal necessitates the installation of fairly large mufflers. The study shows that, in a number of cases, the fan noise can be reduced by selecting an optimum value for their pressure factor. Here the dimensions and weight of fans may remain the same, but the noise generated will be reduced by 5 - 8 dB as compared with fans designed according to normal methods.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1972
Accession Number
AD0746743

Entities

People

  • G. A. Khoroshev
  • S. Y. Novozhilov
  • Yu I. Petrov

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Boundary Layer
  • Clearances
  • Diameters
  • Efficiency
  • Energy
  • Flow
  • Flow Separation
  • Frequency
  • High Energy
  • Language
  • Leading Edges
  • Scientific And Technical Intelligence
  • Spectra
  • Technical Intelligence
  • Trailing Edges
  • Transitions
  • Translations

Readers

  • Acoustics.
  • Aerodynamics.
  • Systems Analysis and Design