A novel vortex generator, termed as “slotted vortex generator,” is proposed in this study. Computations are conducted for supersonic flow at a freestream Mach number of 2.5 past single vortex generators of three different heights. For each device height , three values of the slot radius , , and are used. Comparisons made with a standard wedge-type vortex generator using streamwise-velocity profiles, near-surface streamwise-velocity contours, pitot pressure deficit contours, etc., indicate that the new device has less device drag and produces fuller near-surface streamwise velocities downstream of the device. It is observed that the primary counter-rotating vortex pair formed due to the vortex generator lifts off at a slower rate when a slotted vortex generator is used. Computations of an impinging oblique-shock/boundary-layer interaction at Mach 2.5 for a flow turning angle of 7 deg, with flow control using (separately) an array of slotted and standard vortex generators, indicate that the slotted vortex generators with are most effective in reducing the region with reversed flow when placed closer to the shock/boundary-layer interaction region.
Novel Vortex Generator for Mitigation of Shock-Induced Flow Separation
Journal of Propulsion and Power ; 32 , 5 ; 1264-1274
2016-07-06
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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