HIGH VELOCITY JET NOISE SOURCE LOCATION AND REDUCTION. TASK 2 SUPPLEMENT. COMPUTER PROGRAM FOR CALCULATING THE AEROACOUSTIC CHARACTERISTICS OF JETS FORM NOZZLES OF ARBITRARY SHAPE

A computational procedure is presented for predicting the aerodynamic and acoustic characteristics of jets from nozzles of arbitrary shape. The procedure treats the jet plume as a collection of uncorrelated multipole sound sources which convect with the flow. The aerodynamic characteristics of the jet are evaluated utilizing an extension of Reichardt's theory for free turbulent flows. The acoustic radiation from each of the sound sources is evaluated from high-frequency asymptotic solutions of Lilley's equation. The jet plume is subdivided into several hundred elemental volume sources, each roughly the size of a turbulent eddy volume. The correlated sound level spectra of the individual eddy volumes are summed on a mean-square pressure basis to yield the total turbulent mixing noise levels. An auxiliary calculation of shock-cell broadband noise is made and added to the turbulent mixing noise spectrum to give the total farfield noise. A description of the computational model and associated computer program is presented herein, along with a sample of input and output. A FORTRAN listing of the computer program is also included. (Author)

  • Supplemental Notes:
    • Supplement to Task 2, AD-A094 291. See also Task 3, Volume 1, AD-A094 293.
  • Corporate Authors:

    General Electric

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

    Federal Aviation Administration

    800 Independence Avenue, SW
    Washington, DC  United States  20591
  • Authors:
    • Gliebe, P R
  • Publication Date: 1978-5

Media Info

  • Pagination: 145 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00328892
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: R78AEG324, FAA-RD-76-79-2A
  • Contract Numbers: DOT-OS-30034
  • Files: NTIS, USDOT
  • Created Date: May 21 2003 12:00AM