DESCRIPTION OF A HELICOPTER ROTOR NOISE COMPUTER PROGRAM

Abstract

The report contains a comprehensive description of a computer program developed for the numerical evaluation of the helicopter noise equations derived in AD-684 394, 'Studies of Helicopter Rotor Noise.' It is completely self- contained in that the program details are described, starting from two basic acoustic equations and covering methods by which these equations are applied to the rotor noise problem. Program flow diagrams and a complete listing are presented together with input instructions and sample inputs and outputs. The program is written in FORTRAN IV for the CDC 3300 Computer.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1969
Accession Number
AD0684395

Entities

People

  • John B. Ollerhead
  • Robert B. Taylor

Tags

DTIC Thesaurus Topics

  • Aerodynamic Forces
  • Aerodynamic Loading
  • Aircrafts
  • Army Aviation
  • Blades
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Digital Computers
  • Doppler Effect
  • Flight Paths
  • Frequency
  • Helicopter Rotors
  • Helicopters
  • Mach Number
  • Sound Pressure
  • Vehicles

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Computer Science.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).