DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click
HERE to register or log in.
Accession Number:
AD1004039
Title:
Measurements to Understand the Flow Mechanisms Contributing to Tandem Rotor Outwash
Descriptive Note:
Conference Paper
Corporate Author:
US Army Aviation Development Directorate Moffett Field United States
Report Date:
2015-05-23
Pagination or Media Count:
36.0
Abstract:
Downwash and outwash characteristics of a model-scale tandem-rotor system in the presence of the ground were analyzed by identifying and understanding the physical mechanisms contributing to the observed flow field behavior. A building block approach was followed in simplifying the problem, separating the effects of the fuselage, effects of one rotor on the other, etc. Flow field velocities were acquired in a vertical plane at four aircraft azimuths of a small-scale tandem rotor system using the particle image velocimetry PIV technique for radial distances up to 4 times the rotor diameter. Results were compared against full-scale CH-47D measurements.
Distribution Statement:
APPROVED FOR PUBLIC RELEASE