Rotorcraft AeromechanicsA rotorcraft is a class of aircraft that uses large-diameter rotating wings to accomplish efficient vertical take-off and landing. The class encompasses helicopters of numerous configurations (single main rotor and tail rotor, tandem rotors, coaxial rotors), tilting proprotor aircraft, compound helicopters, and many other innovative configuration concepts. Aeromechanics covers much of what the rotorcraft engineer needs: performance, loads, vibration, stability, flight dynamics, and noise. These topics include many of the key performance attributes and the often-encountered problems in rotorcraft designs. This comprehensive book presents, in depth, what engineers need to know about modelling rotorcraft aeromechanics. The focus is on analysis, and calculated results are presented to illustrate analysis characteristics and rotor behaviour. The first third of the book is an introduction to rotorcraft aerodynamics, blade motion, and performance. The remainder of the book covers advanced topics in rotary wing aerodynamics and dynamics. |
Contents
Computational Aerodynamics | 462 |
Noise | 493 |
Mathematics of Rotating Systems | 545 |
Blade Motion | 582 |
Beam Theory | 671 |
Dynamics | 710 |
Flap Motion | 749 |
Stability | 788 |
Unsteady Aerodynamics | 366 |
Actuator Disk | 414 |
Stall | 442 |
Flight Dynamics | 844 |
Comprehensive Analysis | 915 |
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Common terms and phrases
advance ratio aerodynamic forces aircraft airfoil American Helicopter Society analysis angle angle-of-attack articulated rotor autogyro autorotation axial axis bending blade element theory blade loading blade motion blade pitch blade section bound circulation calculated chord coefficient collective pitch configuration coupling cyclic pitch damping defined deflection degrees of freedom disk loading dynamics equations of motion field Figure first fixed flap motion flow flutter forward flight ground resonance harmonics helicopter rotor hence hingeless rotor hover in-plane increase induced power induced velocity inertial inflow influence integral linear longitudinal Mach number main rotor mode shape momentum theory non-rotating frame obtained pitch moment plane profile power radial response result root rotor blade rotor disk rotor speed rotor thrust rotor wake rotorcraft shaft shed wake significant solution specific stability stall swashplate tail rotor tip-path torque torsion unsteady vertical vibration vortex vortex ring wake geometry wing zero