CORE ENGINE NOISE CONTROL PROGRAM. VOLUME II. IDENTIFICATION OF NOISE GENERATION AND SUPPRESSION MECHANISMS

The mechanisms of noise generation and suppression for the various core engine noise sources in turbofans were defined through a balanced analytical and experimental program. Model, component, and engine tests were used to substantiate the results of the analysis and to determine the basic noise generating parameters. The results were cast in a general form so as to be applicable to a wide variety of cycles, including future technology turbofan engines. Several suppression concepts were identified through analysis and through logical extension of experience with earlier programs on on high velocity jet noise and fan/compressor noise research. The suppression concepts were validated through model and component tests and through evaluation of available engine data.

• Supplemental Notes:
  • See also Volume 1, AD-A013 128, and Volume 3, AD-A013 131.
• Corporate Authors:

  General Electric

  Marine Turbine & Gear Engineer, 1100 Western Ave
  Lynn, MA  United States  01910

  Federal Aviation Administration

  Systems R&D Service, 800 Independence Avenue, SW
  Washington, DC  United States 
• Authors:
  • Kazin, S B
  • Matta, R K
  • Bilwakesh, K R
  • Clapper, W S
  • Emerling, J J
• Publication Date: 1974-8

Media Info

• Pagination: 517 p.

Subject/Index Terms

• TRT Terms: Acoustic measuring instruments; Acoustics; Aircraft noise; Civil aircraft; Engine components; Jet engines; Noise; Noise control; Turbofan engines
• Uncontrolled Terms: Noise reduction
• Old TRIS Terms: Acoustic measurement; Jet engine noise
• Subject Areas: Aviation; Environment; Vehicles and Equipment;

Filing Info

• Accession Number: 00092127
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt., FAA-RD-74-125-2
• Contract Numbers: DOT-FA72WA-3023
• Files: NTIS, USDOT
• Created Date: Oct 18 1976 12:00AM