Rotary-wing Aerodynamics, Τόμος 1Dover Publications, 1984 - 601 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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Σελίδα 144
... concept to modeling of airscrews started with the development of the ' vortex theory ' whose foundations were laid by Joukowsky1 in the USSR in the late teens and early twenties , and in the West by Goldstein2 in the twenties ...
... concept to modeling of airscrews started with the development of the ' vortex theory ' whose foundations were laid by Joukowsky1 in the USSR in the late teens and early twenties , and in the West by Goldstein2 in the twenties ...
Σελίδα 182
... Concept Figs 4.28 and 4.29 , reproduced from Ref 1 , give some idea as to the limits of the validity of the flat - wake concept . In Fig 4.28 , the downwash velocity V ,, = f ( ) at 7 = 0.7 was computed for a rotor with flat untapered ...
... Concept Figs 4.28 and 4.29 , reproduced from Ref 1 , give some idea as to the limits of the validity of the flat - wake concept . In Fig 4.28 , the downwash velocity V ,, = f ( ) at 7 = 0.7 was computed for a rotor with flat untapered ...
Σελίδα 183
... Concept In the United States , Ormiston14 investigated the flat - wake concept and indicated that because of less computational complexity , this approach may be especially suitable for preliminary design stages . However , similar to ...
... Concept In the United States , Ormiston14 investigated the flat - wake concept and indicated that because of less computational complexity , this approach may be especially suitable for preliminary design stages . However , similar to ...
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Notes on Metric System | 1 |
3 | 8 |
4 | 16 |
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actuator disc aerodynamic airfoil airfoil section airspeed angle-of-attack approach assumed axis Biot-Savart law blade element blade element theory blade station boundary layer calculations chord circulation computed determined disc loading downwash downwash distribution downwash velocity drag coefficient effects equation expressed factor Figure flow forward flight fuel fuselage gross weight Helicopter Rotor horizontal flight hover hypothetical helicopter induced power induced velocity kindh lift coefficient lifting surface Mach number main rotor maximum momentum theory nondimensional number of blades obtained parasite drag percent performance pitch angle plane power required predictions profile drag profile power radius rate of climb ratio resulting rotation rotor disc rotor power rotor thrust shown in Fig single-rotor slipstream stall tail rotor tandem tandem-rotor tion tip losses TRUE AIRSPEED values variation vector velocity component velocity potential vortex filament vortex theory vortices wake wing
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Flight Performance of Fixed and Rotary Wing Aircraft Antonio Filippone Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2006 |