Rapid oscillations of test-section flow velocity can be generated in a wind tunnel using flow-control louvers installed in the wind-tunnel circuit; however, control of the test-section velocity must still account for the dynamic behavior of the wind tunnel itself. In this paper, the dynamic behavior of a low-speed closed-circuit wind tunnel in response to dynamic louver excitation is examined using an experimentally validated method-of-characteristics modeling approach. The model is used to develop and test a method of controlling the louver motions to simulate longitudinal gusts with a von Kármán gust spectrum for length scales from 0.1 to 10 m. Results showing improvement of the wind-tunnel dynamic behavior using a Helmholtz resonator are also presented.


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    Title :

    Dynamic Behavior and Gust Simulation in an Unsteady Flow Wind Tunnel


    Contributors:

    Published in:

    AIAA Journal ; 57 , 4 ; 1423-1433


    Publication date :

    2019-01-25


    Size :

    11 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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