By Joslin, Ronald D.; Jones, Gregory S.(eds.)
In line with papers from the 2004 NASA/ONR flow keep watch over Workshop, this assortment is a useful, unique source at the state of the art in move keep watch over applied sciences and functions. Filling the knowledge hole among 1986, whilst the final such symposium was once held, and this present day, it summarizes the purposes, experiments, computations and theories regarding movement keep an eye on, emphasizing basic physics, platforms research and utilized learn. The papers offered hide a large choice of aerodynamic and hydrodynamic functions together with; naval automobiles, fixed-wing aviation, V/STOL structures, propulsion structures, and flooring vehicles.
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30. For lighter aircraft weights, blown takeoff rolls of 400-500 ft are possible with 0 kn headwind, about a third that of the conventional aircraft; with a 20 kn headwind (wind over deck), 200-300 ft Chapter 3 Exploratory Investigations of Circulation Control Technology: Overview for Period 1987-2003 at NSWCCD Robin Imber* Naval Air Systems Command, Patuxent River, Maryland and Ernest Rogerst and Jane Abramsont Naval Sur$ace War$are Center-Carderock Division, West Bethesda, Maryland Nomenclature A = area of CC slot, or area of foil planform AR = aspect ratio C, = momentum coefficient of slot flow (rizvj/qS) CL = lift coefficient ( L / q S ) C, = drag coefficient ( D / q S ) C, = power coefficient CT = thrust coefficient c = chord length D = drag force d = diameter, or camber line offset h = CC slot exit height (gap) L = lift force rit = mass flow (pAV) PR = pressure ratio q = dynamic pressure (&pV2) S = planform area of lifting surface t = thickness of airfoil *Aerospace Engineer.
36 with lift coefficient as a function of C, for the model at 10 deg AOA. At low C, levels, the wing performed slightly better than expected, producing a lift augmentation ratio of 36 in the initial linear portion of the curve. Transition from a linear to a squareroot-like response to C, occurred, as expected, at the higher blowing levels. An important discovery was made early in the test. With only the upper slot blowing, lift roll-off occurred at a much lower C, than expected, as shown on INVESTIGATIONS OF CC TECHNOLOGY AT NSWCCD Fig.
The author suggests reviewing Table 3 before reading further. As a simple illustration of force vectoring capability, a long strand of yam was positioned in the center of the CC-Duct. The photograph on the left of Fig. 16 shows the configuration with no CC blowing. The yam is aligned with the tunnel free stream velocity, along the longitudinal axis of the Duct. The photograph on the right of Fig. 16 was taken for a complimentary halves configuration, where the outer lower slot is active and the upper inner slot is active.
Applications of Circulation Control Technologies by Joslin, Ronald D.; Jones, Gregory S.(eds.)