By Joslin, Ronald D.; Jones, Gregory S.(eds.)
In line with papers from the 2004 NASA/ONR circulate keep an eye on Workshop, this assortment is a useful, extraordinary source at the state of the art in stream keep watch over applied sciences and purposes. Filling the data hole among 1986, while the final such symposium was once held, and this day, it summarizes the purposes, experiments, computations and theories regarding flow keep an eye on, emphasizing primary physics, structures research and utilized examine. The papers offered conceal a large choice of aerodynamic and hydrodynamic purposes together with; naval automobiles, fixed-wing aviation, V/STOL structures, propulsion platforms, and flooring vehicles.
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F. Advanced CCW Airfoils DTNSRDC and Grumman took two approaches to the drag p r ~ b l e m , ~ ~ ’ ~ ~ - ~ one a fixed simple radius reduction and the second a very-small-chord deflectable CCW flap. CCW rounded and semiround (96 deg arc instead of 180 deg) OVERVIEW OF CC PNEUMATIC AERODYNAMICS 41 designs were tested, including a series of smaller radii, looking for reduced drag without loss of lift augmentation. 009~was found to produce very little drag penalty yet have superb lifting capability.
ROGERS, AND J. ABRAMSON electromagnetic actuator 14 Fig. 30 Trailing edge of dual-slotted hydrofoil: rotor pivots to open/close upper lower slots. Constant fluid pressure results in high-response-rate,efficient system. model and Fig. 3 1 depicts the actuator mechanism construction. A small rocker valve embedded in the trailing edge uses an electromagnetic actuator attached to a permanent magnet assembly to produce a high-frequency response of the rocker valve. As shown in Fig. 30, there is an optional nonmovable trailing edge tail section.
24 was applied to a 737 wing characterized in Fig. 29. The typical 15 moving elements per wing were replaced with the CCW single element flaps and LE blowing, yielding perhaps a maximum of three components per wing (the outboard CCW flap became the aileron, and blowing differentially on the CCW flap replaced the spoilers for roll). Using only fan bleed air (and the associated lower thrust lost), replacing the conventional flaps with CCW was able to triple the usable lift at takeoff and produce the ground roll reductions shown in Fig.