The Army rotorcraft aeroacoustic programs are reviewed, highlighting the theoretical and experimental progress made by Army researchers in the physical understanding of helicopter impulsive noise. The two impulsive noise sources addressed over this past decade are high-speed impulsive noise and blade-vortex interaction noise, both of which have had and will continue to have an increasing influence on Army rotorcraft design and operations. The advancements discussed are in the areas of in-flight data acquisition techniques, small-scale-model tests in wind tunnels, holographic interferometry/tomographic techniques, and the expanding capabilities of computational fluid dynamics in rotorcraft acoustic problems. Current theoretical prediction methods are compared with experimental data, and parameters that govern model scaling are established. The very successful cooperative efforts between the Army, NASA, and industry are also addressed
Aeroacoustic research programs at the Army Aviation Research and Technology Activity
1988-02-01
Miscellaneous
No indication
English
Aeroacoustic research: An Army perspective
NTRS | 1978
|Requirements governing Army aviation research
AIAA | 1968
|Army Aviation Training - Research Now and Then
SAE Technical Papers | 1978
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