CORE ENGINE NOISE CONTROL PROGRAM. VOLUME I. IDENTIFICATION OF COMPONENT NOISE SOURCES

The various noise sources constituting the core engine noise for turbofan engines were identified and rank ordered. An investigation was made to ascertain the generating mechanisms, controlling variables, means of identification, and the effect on engine design if reduction were required for each of eight core engine noise sources. The relative significance of the various noise sources was evaluated by predicting the noise contribution of the individual components by the methods derived during the course of the Core Engine Noise Control Program. The predictions were made for each of the three hypothetical cycles for bypass ratios of 4, 7, and 14, respectively, which were formulated to encompass a range of commercial aircraft powerplants.

• Supplemental Notes:
  • See also Volume 2, AD-A013 129.
• 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:
  • Kazan, S B
  • Matta, R K
  • Bilwakesh, K R
  • Harris, V G
  • Latham, D
• Publication Date: 1974-8

Media Info

• Pagination: 119 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: 00092126
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: Final Rpt., FAA-RD-74-125-1
• Contract Numbers: DOT-FA72WA-3023
• Files: NTIS, USDOT
• Created Date: Oct 18 1976 12:00AM