The primary goal of this thesis was the development of an experimental technique, and supporting software, for the acquisition and analysis of unsteady velocity data generated by an oscillating airfoil. This research was in support of a major investigation of the compressibility effects on dynamic stall. The experimental procedure involved schlieren flow visualization for comparison of steady and unsteady flow fields, and for determination of parameters for further study. Laser Doppler velocimeter was employed for obtaining velocity data in the airfoil wake. For unsteady data, the airfoil was oscillated in pitch about its quarter chord. The data analysis produced wake profile plots representing the flow field distributed by the airfoil. Results were obtained for steady and unsteady conditions.


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    Title :

    Unsteady flow field measurements using LDV (laser doppler velocimetry)


    Additional title:

    Messung des instationaeren Stroemungsfelds mit Hilfe der Laser-Doppler-Geschwindigkeitsmessung


    Contributors:

    Published in:

    Publication date :

    1987


    Size :

    73 Seiten


    Type of media :

    Report


    Type of material :

    Print


    Language :

    English