Rotary-Wing AerodynamicsCourier Corporation, 22 Απρ 2013 - 640 σελίδες Recent literature related to rotary-wing aerodynamics has increased geometrically; yet, the field has long been without the benefit of a solid, practical basic text. To fill that void in technical data, NASA (National Aeronautics and Space Administration) commissioned the highly respected practicing engineers and authors W. Z. Stepniewski and C. N. Keys to write one. The result: Rotary-Wing Aerodynamics, a clear, concise introduction, highly recommended by U.S. Army experts, that provides students of helicopter and aeronautical engineering with an understanding of the aerodynamic phenomena of the rotor. In addition, it furnishes the tools for quantitative evaluation of both rotor performance and the helicopter as a whole. Now both volumes of the original have been reprinted together in this inexpensive Dover edition. In Volume I: "Basic Theories of Rotor Aerodynamics," the concept of rotary-wing aircraft in general is defined, followed by comparison of the energy effectiveness of helicopters with that of other static-thrust generators in hover, as well as with various air and ground vehicles in forward translation. Volume II: "Performance Prediction of Helicopters" offers practical application of the rotary-wing aerodynamic theories discussed in Volume I, and contains complete and detailed performance calculations for conventional single-rotor, winged, and tandem-rotor helicopters. Graduate students with some background in general aerodynamics, or those engaged in other fields of aeronautical or nonaeronautical engineering, will find this an essential and thoroughly practical reference text on basic rotor dynamics. While the material deals primarily with the conventional helicopter and its typical regimes of flight, Rotary-Wing Aerodynamics also provides a comprehensive insight into other fields of rotary-wing aircraft analysis as well. |
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Αποτελέσματα 1 - 5 από τα 80.
Σελίδα xi
... Circulation Varying Along the Blade Surface . . . . . . . . . . . . . . . 157 5. Simple Rotor Wake Models in Forward Flight . . . . . . . . . 159 5.1 Development of the Concept . . . . . . . . . . . . . . . . . . . . . . . . . . 159 5.2 ...
... Circulation Varying Along the Blade Surface . . . . . . . . . . . . . . . 157 5. Simple Rotor Wake Models in Forward Flight . . . . . . . . . 159 5.1 Development of the Concept . . . . . . . . . . . . . . . . . . . . . . . . . . 159 5.2 ...
Σελίδα xiii
... Circulation . . . . . . . . . . . . . . . 298 4.2 Conformal Transformation . . . . . . . . . . . . . . . . . . . . . . . 300 5. Effects of Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . 303 5.1 Shearing Forces in Gases ...
... Circulation . . . . . . . . . . . . . . . 298 4.2 Conformal Transformation . . . . . . . . . . . . . . . . . . . . . . . 300 5. Effects of Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . 303 5.1 Shearing Forces in Gases ...
Σελίδα 8
... circulation control through blowing and/or suction, flaps, and spoilers. All of these potential means of lift control should be activated in such a way that the effect sought in (1) is achieved. The p sin ill term is of the first ...
... circulation control through blowing and/or suction, flaps, and spoilers. All of these potential means of lift control should be activated in such a way that the effect sought in (1) is achieved. The p sin ill term is of the first ...
Σελίδα 9
... circulation control have been proposed by Yuan', Cheesemens, Dorand', and Williams7. However, our attention will be focused on the de la Cierva blade articulation approach, as it represents the most widely used scheme of dealing with ...
... circulation control have been proposed by Yuan', Cheesemens, Dorand', and Williams7. However, our attention will be focused on the de la Cierva blade articulation approach, as it represents the most widely used scheme of dealing with ...
Σελίδα 19
... circulation control through blowing or suction. At present, however, the most common way of varying the blade thrust around the azimuth is through feathering—a periodic change of the blade pitch angle 60 as a whole. This variation of 60 ...
... circulation control through blowing or suction. At present, however, the most common way of varying the blade thrust around the azimuth is through feathering—a periodic change of the blade pitch angle 60 as a whole. This variation of 60 ...
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aerodynamic airfoil airfoil section airspeed altitude angle angle-of-attack assumed autorotation axis azimuth blade element blade element theory blade station boundary layer calculations chord circulation collective pitch computed configurations cruise defined descent determined downwash downwash velocity drag coefficient effects engine equation expressed factor field Figure first flapping hinge flow fluid forward flight fuel fuselage gross weight Helicopter Rotor hover hypothetical helicopter increase induced drag induced power induced velocity influence interference drag lift coefficient lifting surface Mach number main rotor maximum momentum theory nondimensional obtained parasite drag percent performance pitch power required predictions pressure profile drag profile power radius rate of climb ratio resulting Reynolds number rotor disc rotor power rotor thrust shown in Fig significant single-rotor slipstream specific stall tail rotor tandem tandem-rotor tion TRUE AIRSPEED values variation vector velocity component velocity potential vortex filament vortex theory vortices wake wind-tunnel wing