publication . Doctoral thesis . 1989

Mapping the airwake of a model DD-963 along specific helicopter flight paths

Anderson, Gustav A.;
Open Access English
  • Published: 01 Dec 1989
  • Publisher: Monterey, California. Naval Postgraduate School
Approved for public release; distribution unlimited This study is a continuation from the flow visualization studies done in the NPS low-speed environmental wind tunnel. The long term goal is to map the airwake around a ship model and scale to full size for the purpose of determining safe operating envelopes on non-aviation ships. This project utilized hot wire and hot film anemometry to establish a data base for helicopter approach paths at 0°, 30° port, and 30° starboard ship yaw angles. Calibration of the wind tunnel revealed that some turbulence generators, used in the previous two studies, created excessive turbulence intensity levels and were subsequently ...
free text keywords: Turbulence Intensity, Bluff-Body Aerodynamics, Spectrum, Auto-Correlation, Airwake Analysis, Operating Envelopes
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