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Vortical Flow Management for Improved Configuration Aerodynamics - Recent Experiences
VIGYAN RESEARCH ASSOCIATES INC HAMPTON VA
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This paper reports recent progress in vortex-control applications for alleviating the adverse consequences of three-dimensional separation and vortical interactions on slender bodyswept wing configurations. Examples include helical separation trip to alleviate the side force due to forebody vortex asymmetry hinged strakes to avoid vortex breakdown effects compartmentation of swept leading-edge separation to delay the pitch-up instability under-wing vortex trip and vortex flaps for drag reduction at high lift and an apex-flap trimmer to fully utilize the lift capability of trailing- edge flaps for take off and landing of delta wings. Experimental results on generic wind-tunnel models are presented to illustrate the vortex-management concepts involved and to indicate their potential for enhancing the subsonic aerodynamics of supersonic-cruise type vehicles.
APPROVED FOR PUBLIC RELEASE