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


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    Titel :

    Aeroacoustic Research Programs at the Army Aviation Research and Technology Activity


    Beteiligte:
    Y. H. Yu (Autor:in) / F. H. Schmitz (Autor:in) / H. A. Morse (Autor:in)

    Erscheinungsdatum :

    1988


    Format / Umfang :

    23 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Aeroacoustic research programs at the Army Aviation Research and Technology Activity

    Yu, Yung H. / Schmitz, Fredric H. / Morse, H. Andrew | NTRS | 1988


    Aeroacoustic research: An Army perspective

    Morse, H. A. / Schmitz, F. H. | NTRS | 1978




    Army Aviation Training - Research Now and Then

    Bynum, James A- | SAE Technical Papers | 1978