Rotor Downwash Velocities about the UH-1M Helicopter - Flight Test Measurements and Theoretical Calculations

Abstract

Downwash velocity data from a flight test of the UH-1M helicopter are presented in comparison with calculated values. Hot film anenometers were used to measure flow velocities at five points in the downwash for a variety of aircraft forward velocities and hover. The theoretical predictions were made using a mathematical model of sources and sinks to simulate the fuselage and vortex filaments to simulate the rotor wake. Problems peculiar to the flight test are discussed.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1975
Accession Number
ADA008965

Entities

People

  • A. S. Marks
  • B. Z. Jenkins

Tags

Communities of Interest

  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Pressure
  • Aircrafts
  • Airspeed
  • Attack Helicopters
  • Blades
  • Boundaries
  • Computer Programs
  • Computers
  • Coordinate Systems
  • Flow
  • Flow Fields
  • Helicopters
  • Instrumentation
  • Measurement
  • Mechanical Properties
  • Rotary Wing Aircraft
  • Simulations

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Modeling and Simulation