FOREBODY FLOW CONTROLS FOR CHINED FOREBODY CONFIGURATIONS

THE EXTERNAL CONFIGURATION OF ADVANCED, LOW-OBSERVABLE AIRCRAFT HAVE EVOLVED TO INCLUDE CHINED FOREBODIES. AT THE SAME TIME, AGILITY REQUIREMENTS HAVE BEEN ADDED TO MANEUVER WELL INTO THE HIGH-ANGLE-OF- ATTACK REGION WHERE CONVENTIONAL CONTROLS ARE LIMITED. IT IS PROPOSED TO EXAMINE THE CAPABILITY OF FOREBODY VORTEX CONTROL DEVICES, SUCH AS ASYMMETRICALLY DEPLOYED STRAKES AND BLOWING (OR SUCTION) SLOTS OR JETS ON SUCH CHINED CONFIGURATIONS TO DEVELOPE ALTERNATE HIGH ANGLE-OF-ATTACK CONTROL SCHEMES FOR THESE ADVANCED DESIGNS. THIS EFFORT WOULD EXAMINE SUCH DEVICES UNDER BOTH STATIC AND DYNAMIC CONDITIONS, SUCH AS DURING A VELOCITY VECTOR ROLLING MANEUVER, BY MEASURING THEIR EFFECTIVENESS WHILE ROLLILNG ON A ROTARY BALANCE. THIS WILL DETERMINE THEIR ABILITY NOT ONLY TO INITIATE A CONTROL MOMENT BUT TO GENERATE AN ARRESTING MOMENT, AS WELL. BECAUSE VORTEX MANIPULATION TECHNIQUES RESULT IN A FINITE LAG BETWEEN CONTROL APPLICATION AND MOMENT GENERATION, WITH POSSIBLE NON-LINEAR TRANSIENTS ANY TIME DEPENDANT CHARACTERISTICS OF THESE DEVICES WILL LIKEWISE BE DETERMINED.