Accession Number:

ADA242827

Title:

Inflow Measurements made with a Laser Velocimeter on a Helicopter Model in Forward Flight. Volume 6. Rectangular Planform Blades at an Advance Ratio of 0.35

Descriptive Note:

Technical memo.,

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA

Report Date:

1989-04-01

Pagination or Media Count:

391.0

Abstract:

An experimental investigation was conducted in the 14- by 22-Foot subsonic Tunnel at the NASA Langley Research Center to measure the inflow into a scale model helicopter rotor in forward flight micro 0.35. The measurements were made with a two-component Laser Velocimeter LV one chord above the plane formed by the path of the rotor tips tip-path-plane. A conditional sampling technique was used to determine the position of the rotor at the time that each velocity measurement was made so that the azimuthal fluctuations in velocity could be determined. Measurements were made at a total of 179 separate locations in order to clearly define the inflow character. Author

Subject Categories:

  • Helicopters
  • Test Facilities, Equipment and Methods
  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE