Accession Number:

ADA230338

Title:

Wind-Tunnel Survey of an Oscillating Flow Field for Application to Model Helicopter Rotor Testing

Descriptive Note:

Technical memo.

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA

Personal Author(s):

• Mirick, Paul H.
• Hamouda, M.
• Yeager, Jr, William T.

Report Date:

1990-12-01

Pagination or Media Count:

36.0

Abstract:

A survey was conducted of the flow field produced by the airstream oscillator system AOS in the Langley Transonic Dynamics Tunnel TDT. The magnitude of a simulated gust field was measured at 15 locations in the plane of a typical model helicopter rotor when tested in the TDT using the aeroelastic rotor experimental system ARES model. These measurements were made over a range of tunnel dynamic pressures typical of those used for an ARES test. The data indicate that the gust field produced by the AOS is nonuniform across the tunnel test section, but that it should be sufficient to excite a model rotor. EDC

Descriptors:

• *OSCILLATORS
• MODELS
• DYNAMICS
• AIR FLOW
• TEST EQUIPMENT
• HELICOPTER ROTORS
• TUNNELS
• FLOW FIELDS
• SURVEYS
• MODEL TESTS
• GUSTS
• UNSTEADY FLOW
• ROTORS
• OSCILLATION
• DYNAMIC PRESSURE
• WIND TUNNELS
• TRANSONIC WIND TUNNELS
• SIMULATION

Subject Categories:

• Aerodynamics
• Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE