The concepts of holography and holographic interferometry, as applied to the visualization and measurement of the three dimensional flow field near a rotor tip, are previewed, and initial experimental results of investigations of local shock structures and tip vortices behind the blade are presented. An additional method to visualize the flow in a three dimensional manner is demonstrated, and finally, a method to quantitatively measure the three dimensional flow, which will provide the necessary information to help improve helicopter performance and reduce noise, is introduced.


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    Title :

    Holographic interferometry technique for rotary wing aerodynamics and noise


    Contributors:

    Conference:

    Army Sci. Conf. ; 1982 ; West Point, NY, United States


    Publication date :

    1981-01-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English





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