An Investigation of Noise Generation on a Hovering Rotor, Part 2

Abstract

The study is a natural extension of the program to investigate noise generation on a hovering rotor reported in an previous investigation. That program acquired data on a large (60 ft.) diameter rotor operating on a whirl tower, and evaluated that data in the light of established analytical procedures. The work described in this report compares available data in order to investigate the effects of variations in rotor design. This data, which was available from other test programs included variations in number of blades of similar airfoil, airfoil, and platform. Also included is an evaluation of model testing by comparison of the results of the full size helicopter rotor with a one-eleventh scale model.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1972
Accession Number
AD0753397

Entities

People

  • C. Bobo
  • D. Carmichael
  • H. Sternfeld
  • R. Spencer
  • T. Fukushima

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Aircrafts
  • Amplitude
  • Blade Tips
  • Computer Programs
  • Doppler Effect
  • Flow Visualization
  • Fluid Flow
  • Mach Number
  • Measurement
  • Noise
  • Peak Values
  • Pressure Distribution
  • Scale Models
  • Shock Waves
  • Sound Pressure
  • Test And Evaluation

Fields of Study

  • Physics

Readers

  • Aerodynamics.