Prediction methods for core engine noise were reviewed and either updated or new noise evaluation techniques formulated for low velocity coannular jets, combustors ('core' noise), Low pressure turbines, interaction between turbine tones and fan/core jet streams, obstructions in the flow passages and casing radiation. The development was based, to a large extent, on the analytical investigation and the model, component and engine tests evaluated during Phases 2 and 3 of this program. The results were cast in a general form, so as to be applicable to a wide variety of cycles, including present and future turbofan engines. The prediction methods were validated with measured acoustic data wherever possible.

  • 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:
    • Kazin, S B
    • Matta, R K
    • Bilwakesh, K R
    • Emmerling, J J
    • Latham, D
  • Publication Date: 1974-8

Media Info

  • Pagination: 179 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00092128
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Final Rpt., FAA-RD-74-125-3
  • Contract Numbers: DOT-FA72WA-3023
  • Files: NTIS, USDOT
  • Created Date: Oct 18 1976 12:00AM