An experimental investigation is conducted to improve the control effectiveness of an array of vane-type vortex generators (VG) implemented 6 δ upstream of an incident shock-induced separation generated using a 14-deg wedge in a Mach 2.05 flow. Initially, the effect of an array of rectangular vanes (RRV) is studied by varying the vane 1) chord to height ( c / h ) = 7.2 , 4.2, 2) angle α = 24 , 20, 18, and 16 deg, 3) height to boundary-layer thickness ( h / δ ) = 0.75 , 0.5, 0.3, and 0.2, and 4) interdevice spacing to height ( s / h ) = 12 , 9.5, 7.5, 6.5, 5.7, 5.5, and 5.0. Similar tests were also performed for ramp vanes (RV) with α = 24    deg . Due to inherent design differences, an RRV device generates a larger region of vortex influence relative to an RV device. Therefore, reducing s / h significantly reduces the extent of uncontrolled separation regions between neighboring VGs that improves their separation control capability. The best performing RRV devices with vane height h / δ = 0.5 , h / δ = 0.3 , and h / δ = 0.2 show maximum reduction in separation extent of nearly 80, 74, and 70%, respectively, relative to no control. The equivalent RV devices, however, show much reduced control effectiveness. All controls exhibit a shift in the dominant separation frequency to higher values, indicating a reduction in the overall extent of separation.


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    Title :

    Improved Effectiveness of Vane-Type Vortex Generators for Incident Shock-Induced Separation


    Contributors:

    Published in:

    AIAA Journal ; 62 , 11 ; 4127-4143


    Publication date :

    2024-11-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English







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