Review and Analysis of the DNW/Model (Duits-Nederlandse Windtunnel) 360 Rotor Acoustic Data Base

Abstract

A comprehensive model rotor aeroacoustic data base was collected in a large anechoic wind tunnel in 1986. Twenty-six microphones were positioned around the azimuth to collect acoustic data for approximately 150 different test conditions. A dynamically scaled, blade-pressure-instrumented model of the forward rotor of the BH 360 helicopter simultaneously provided blade pressures for correlation with the acoustic data. High-speed impulsive noise, blade-vortex interaction noise, low-frequency noise, and broadband noise were all captured in this extensive data base. This paper presents trends in each noise source, with important parametric variations. The purpose of this paper is to introduce this data base and illustrate its potential for predictive code validation. (jes)

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1989
Accession Number
ADA214865

Entities

People

  • D. A. Boxwell
  • R. A. Zinner
  • R. H. Spencer

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Aircrafts
  • Broadband
  • Civil Aviation
  • Data Acquisition
  • Databases
  • Diameters
  • Fast Fourier Transforms
  • Frequency
  • Helicopters
  • Mach Number
  • Microphones
  • Power Spectra
  • Revolutions
  • Sound Pressure
  • Test Stands
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Aerospace Engineering
  • Computational Modeling and Simulation