Rotary-wing AerodynamicsRecent 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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Σελίδα 317
For freestream velocities smaller than M = 0.4 where M is the Mach number of the
distant flow, compressiblity effects can usually be ignored, but as the freestream
Mach number becomes higher, the aerodynamic characteristics of bodies, ...
For freestream velocities smaller than M = 0.4 where M is the Mach number of the
distant flow, compressiblity effects can usually be ignored, but as the freestream
Mach number becomes higher, the aerodynamic characteristics of bodies, ...
Σελίδα 320
It is now easy to read the critical Mach number corresponding to any value of the
section-lift coefficient experienced by the airfoil at low speeds. Drag Coefficients.
Drag coefficients of airfoils are influenced by compressibility, and there are ...
It is now easy to read the critical Mach number corresponding to any value of the
section-lift coefficient experienced by the airfoil at low speeds. Drag Coefficients.
Drag coefficients of airfoils are influenced by compressibility, and there are ...
Σελίδα 25
The V23010-1.58 section drag characteristics are presented in Fig 2.4 as a
function of Mach number for various angle-of-attack settings. The airfoil cd varies
from 0.008 to 0.018 at Mach numbers lower than the drag divergent Mach
number ...
The V23010-1.58 section drag characteristics are presented in Fig 2.4 as a
function of Mach number for various angle-of-attack settings. The airfoil cd varies
from 0.008 to 0.018 at Mach numbers lower than the drag divergent Mach
number ...
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Περιεχόμενα
Introduction | 1 |
Momentum Theory | 44 |
Tandem Rotor Interference in Horizontal Flight | 83 |
Πνευματικά δικαιώματα | |
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aerodynamic airfoil section airspeed altitude angle-of-attack approach assumed autorotation axis azimuth Biot-Savart law blade element blade element theory blade station boundary layer calculations chord circulation computed configuration cruise descent determined distribution doublet downwash velocity drag coefficient effects engine equation expressed factor Figure flapping hinge flow forward flight fuel function fuselage gross weight Helicopter Rotor hover hypothetical helicopter increase induced power induced velocity interference drag lift coefficient lifting surface located Mach number main rotor maximum momentum theory nondimensional number of blades obtained parasite drag percent performance plane 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 single-rotor SL/STD slipstream stall tail rotor tandem tandem-rotor tion TRUE AIRSPEED values variation vector velocity component velocity potential vertical climb vortex filament vortex theory vortices wake wind-tunnel wing
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Flight Performance of Fixed and Rotary Wing Aircraft Antonio Filippone Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2006 |