Nomenclature | p. xi |
List of Abbreviations | p. xv |
Preface | p. xvii |
Introduction | p. 1 |
Flapping Flight in Nature | p. 6 |
Unpowered Flight: Gliding and Soaring | p. 7 |
Powered Flight: Flapping | p. 8 |
Hovering | p. 9 |
Forward Flight | p. 10 |
Scaling | p. 14 |
Geometric Similarity | p. 16 |
Wingspan | p. 17 |
Wing Area | p. 17 |
Wing Loading | p. 18 |
Aspect Ratio | p. 18 |
Wing-Beat Frequency | p. 19 |
Power Implication of a Flapping Wing | p. 20 |
Upper and Lower Limits | p. 21 |
Drag and Power | p. 23 |
Concluding Remarks | p. 26 |
Fixed, Rigid-Wing Aerodynamics | p. 28 |
Laminar Separation and Transition to Turbulence | p. 29 |
Navier-Stokes Equation and the Transition Model | p. 35 |
The eN Method | p. 37 |
Case Study: SD 7003 | p. 39 |
Factors Influencing Low Reynolds Number Aerodynamics | p. 44 |
Re = 103-104 | p. 45 |
Re = 104-106 | p. 47 |
Effect of Free-Stream Turbulence | p. 50 |
Effect of Unsteady Free-Stream | p. 54 |
Three-Dimensional Wing Aerodynamics | p. 57 |
Unsteady Phenomena at High Angles of Attack | p. 61 |
Aspect Ratio and Tip Vortices | p. 63 |
Wingtip Effect | p. 70 |
Unsteady Tip Vortices | p. 73 |
Concluding Remarks | p. 76 |
Flexible-Wing Aerodynamics | p. 78 |
General Background of Flexible-Wing Flyers | p. 78 |
Flexible-Wing Models | p. 85 |
Linear Membrane Model | p. 85 |
Hyperelastic Membrane Model | p. 89 |
Combined Fluid-Structural Dynamics Computation | p. 91 |
Coupled Elastic Structures and Aerodynamics | p. 92 |
Flexible Airfoils | p. 92 |
Membrane-Wing Aerodynamics | p. 94 |
Concluding Remarks | p. 100 |
Flapping-Wing Aerodynamics | p. 101 |
Scaling, Kinematics, and Governing Equations | p. 102 |
Flapping Motion | p. 102 |
Reynolds Number | p. 106 |
Strouhal Number and Reduced Frequency | p. 107 |
Nonstationary Airfoil Aerodynamics | p. 109 |
Dynamic Stall | p. 111 |
Thrust Generation of a Pitching/Plunging Airfoil | p. 114 |
Simplified Flapping-Wing Aerodynamics Model | p. 117 |
Lift-Enhancement Mechanisms in Flapping Wings | p. 122 |
Leading-Edge Vortex | p. 124 |
Rapid Pitch-Up | p. 131 |
Wake Capture | p. 134 |
Clap-and-Fling Mechanism | p. 136 |
Wing Structural Flexibility | p. 138 |
Effects of Reynolds Number, Reduced Frequency, and Kinematics on Hovering Aerodynamics | p. 144 |
Hovering Kinematics | p. 144 |
Scaling Effect on Force Generation for Hovering Airfoils | p. 148 |
Aerodynamics of a Hovering Hawkmoth | p. 151 |
Downstroke | p. 152 |
Supination | p. 153 |
Upstroke | p. 155 |
Pronation | p. 155 |
Evaluation of Aerodynamic Forces | p. 155 |
Aerodynamic and Inertial Powers of Flapping Wings | p. 156 |
Concluding Remarks | p. 157 |
References | p. 159 |
Index | p. 175 |
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