An experimental investigation is conducted to improve the control effectiveness of an array of vane-type vortex generators (VG) implemented 6 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 , 4.2, 2) angle , 20, 18, and 16 deg, 3) height to boundary-layer thickness , 0.5, 0.3, and 0.2, and 4) interdevice spacing to height , 9.5, 7.5, 6.5, 5.7, 5.5, and 5.0. Similar tests were also performed for ramp vanes (RV) with . Due to inherent design differences, an RRV device generates a larger region of vortex influence relative to an RV device. Therefore, reducing 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 , , and 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.
Improved Effectiveness of Vane-Type Vortex Generators for Incident Shock-Induced Separation
AIAA Journal ; 62 , 11 ; 4127-4143
2024-11-01
Article (Journal)
Electronic Resource
English
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