induced drag
Numerical Study of Polymer-induced Drag Reduction in Turbulent Pipe Flow
... friction drag of wall-bounded turbulent ...frictional drag compared to that the equivalent flow of the pure solvent 1 ...of drag reduction not only facilitates the development of advanced drag ...
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GLIDING BIRDS: REDUCTION OF INDUCED DRAG BY WING TIP SLOTS BETWEEN THE PRIMARY FEATHERS
... the induced drag factor. For example, one could measure drag before and after cutting off the ends of the tip feathers of a bird gliding in a wind ...the induced drag factor, but it ...
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Reduction of Induced Drag by Single Slotted Raked Wingtip
... because induced drag is typically 30 percent or more of the total drag on a subsonic transport in cruising flight ...10% drag reduction on a large military transport aircraft is estimated to ...
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Reduction of Induced Drag Using Wing Tip Propeller
... [16] Smith M. J., Komerath N., Ames R., Wong O., and Pearson J., “Performance Analysis of A Wing with Multiple Winglets,” AIAA Jr., 2001, Pp. 2001-2407. [17] Smith S.C., Kroot I. M., “Induced Drag ...
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Induced Drag Reduction for Modern Aircraft without Increasing the Span of the Wing by Using Winglet
... The wingtip devices increase the lift generated at the wingtip, and reduce the lift-induced drag caused by wingtip vortices, improving lift-to-drag ratio. This increases fuel efficiency in powered ...
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Induced Drag Savings From Ground Effect and Formation Flight in Brown Pelicans
... Altitudes close to the water and wing tip spacing WTS, distance perpendicular to the flight path between wing tips of adjacent birds at maximum span were measured for brown pelicans duri[r] ...
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Drag reduction by wing tip slots in a gliding Harris' hawk, Parabuteo unicinctus
... the induced drag, but not the profile drag, of planar and non-planar ...wings. Induced drag arises whenever wings produce lift, thereby generating vorticity that leaves kinetic energy ...
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Aerodynamic Analysis of Blended Winglet for Low Speed Aircraft
... of induced drag with single winglet results in minimal drag to lift ...the induced drag without increasing the span of aircraft ...of induced drag without increasing the ...
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Design and Analysis of Spiroid Winglet
... lift-induced drag, but would increase parasitic drag and would require boosting the strength and weight of the ...lift-induced drag caused by wingtip vortices, improving ...
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Optimum Flap Angles for Roll Control on Wings with Multiple Trailing-Edge Flaps
... Building on recent research efforts in the use of multiple trailing-edge flaps on air- craft wings, the current research explores the use of these flaps for efficiently gen- erating rolling moments. By decomposing the ...
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A Study of the Standard Cirrus Wing Lift Distribution Versus Bell Shaped Lift Distribution
... This thesis discusses a comparison of the differences in aerodynamic performance of wings designed with elliptical and bell-shaped lift distributions. The method uses a Standard Cirrus sailplane wing with a lift ...
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Soaring and Gliding Flight of the Black Vulture
... The opening of the wing feathers clearly increases the span of the wing and thereby reduces the trailing vortex, or induced drag, but probably at the expense of increasing the profile dr[r] ...
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Field estimates of body drag coefficient on the basis of dives in passerine birds
... would be desirable since this involves a minimum number of assumptions. However, most birds tracked by radar showed inclined dives, so equation 7 has to be used. The bird tail (Thomas, 1993) and/or body can generate some ...
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Study of Aerodynamics
... Aircraft flying is close to the earth’s surface over either ground or water the phenomenon becomes appreciable when operating within a distance of one wingspan from the boundary. The ground plane alters the flow field ...
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A Design and Analysis Approach for Drag Reduction on Aircraft with Adaptive Lifting Surfaces
... for drag reduction when compared with conventional non- adaptive ...both induced- and profile- components of drag with a trim ...constraint. Induced drag is reduced by optimally ...
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Gliding flight in a jackdaw: a wind tunnel study
... the drag-minimising concept is correct, but that the relative magnitudes of the different drag components, induced and profile drag, might be ...that induced drag has been ...
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Boundary layer models for calving marine outlet glaciers
... the drag exerted by the channel side walls on a floating ice shelf can reduce extensional stress at the grounding ...basal drag coefficient, and a calving parame- ...basal drag on the grounded ...
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Gliding flight: drag and torque of a hawk and a falcon with straight and turned heads, and a lower value for the parasite drag coefficient
... aerodynamic drag and torque on wingless model raptor bodies with their heads in two positions: straight, or turned 40 ° to the ...aerodynamic drag on raptor bodies is presumably minimal for given conditions ...
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Computational Investigation of Aerodynamic Characteristics and Drag Reduction of a Bus Model
... Abstract: It is well-known that buses comprise an important part of mass transportation and that there are many types of buses. At present, the bus transportation is cheaper and easier to use than other means of ...
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Reconfiguration and the reduction of vortex induced vibrations in broad leaves
... 1977a; Koehl, 1977b) reconfigure into cone shapes through deformations of the petals or tentacles, respectively. Macroalgae have adapted to wave-swept shores through increased flexibility and extensibility, which allows ...
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