REDUCING FAN NOISE IN CONSTRUCTION EQUIPMENT

Two types of cooling system fan noise, discrete frequency and broadband noise, can be best reduced by a combination of aerodynamic design and control of the fan environment. Principal fan noise sources include a periodic pressure field, inflow distortion, inflow turbulence, boundary layer separation, vortex shedding, and vibration due to aerodynamic loading. Design for minimum noise requires the optimization of fan geometry (blade angle, solidity, number of blades, blade surface, camber and form) and fan environment, maximum efficiency at the operating point and the lowest possible blade tip speed. Good noise measurements are essential; acoustical test techniques are described. Computer-aided design techniques are required to optimize the fan.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/01487191
• Supplemental Notes:
  • Presented at SAE Earthmoving Industry Conference, Central Illinois Section, Peoria, Illinois, 10-12 April 1978.
• Corporate Authors:

  Society of Automotive Engineers (SAE)

  400 Commonwealth Drive
  Warrendale, PA  United States  15096
• Authors:
  • Baranski, B R
  • Pisarski, J J
• Publication Date: 1978

Media Info

• Features: References;
• Pagination: 8 p.
• Serial:
  • SAE Technical Paper
  • Publisher: Society of Automotive Engineers (SAE)
  • ISSN: 0148-7191
  • EISSN: 2688-3627
  • Serial URL: http://papers.sae.org/

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Aerodynamics; Computer aided design; Construction equipment; Cooling systems; Design; Fans; Noise control
• Old TRIS Terms: Acoustic measurement
• Subject Areas: Design; Safety and Human Factors;

Filing Info

• Accession Number: 00395885
• Record Type: Publication
• Source Agency: National Highway Traffic Safety Administration
• Report/Paper Numbers: SAE 780455, HS-025 499U
• Files: HSL, USDOT
• Created Date: Jul 31 1985 12:00AM