Fan/Compressor Noise Research. Volume 2. Detailed Discussion

Abstract

Test data on a variety of fan and compressor vehicles were used to verify the basic prediction techniques and to study the impact of specific design parameters upon fan/compressor noise, including vane-blade spacing, vane and blade numbers, tip speed, blade loading, rotor sweep, inlet guide vanes and vane lean. Effects of refraction on tone directivities were measured and compared with expectations. Propagation of acoustic waves were studied, with specific experiments conducted to investigate ground reflection phase factor and atmospheric absorption at high frequencies. The prediction systems were summarized in terms of flow charts and tables.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1971
Accession Number
AD0740514

Entities

People

  • H. P. Claes
  • M. J. Benzakein
  • P. R. Knott
  • R. M. Hochheiser
  • S. B. Kazin
  • W. E. Coward

Organizations

  • General Electric

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Bandwidth
  • Boundary Layer
  • Broadband
  • Compressor Noise
  • Compressors
  • Frequency
  • Frequency Bands
  • Guide Vanes
  • Mach Number
  • Noise
  • Plastic Explosives
  • Propulsion Systems
  • Reflection
  • Turbines

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Aerodynamics.
  • Business Analytics

Technology Areas

  • Space
  • Space - Hall-Effect Thruster