商品簡介
Early chapters deal with the aerodynamics of the rotor in hover, vertical flight, forward flight and climb. Analysis of these motions is developed to the stage of obtaining the principal results for thrust, power and associated quantities. Later chapters turn to the characteristics of the overall helicopter, its performance, stability and control, and the important field of aerodynamic research is discussed, with some reference also to aerodynamic design practice.
This third edition has been brought up to date with a complete new set of illustrations & imagery, as well as an accompanying website that contains all the calculation files used in the book, problems, solutions and powerpoint slides. The authors address the unique considerations applicable to rotor UAVs/ MAVs, and coverage of blade dynamics is expanded to include lagging and ground resonance, and new material is included on blade tip design, flow characteristics surrounding the rotor in forward flight, tail rotors, and brown-out, blade sailing and shipborne operations.
作者簡介
Professor John Seddon, formerly Director-General for Research (Air), Ministry of Defence(deceased)
Dr Simon Newman, Southampton University, UK
Simon Newman is a reader in helicopter engineering within the aerodynamics and flight mechanics research group in the Department of Aeronautics and Astronautics at the University of Southampton. His research interests include VSTOL aircraft design & operation, helicopter operation in adverse operational environments, microlight aircraft aeromechanics, shipborne aviation and the use of CAD in aerospace design. He has published widely in these fields and authored 2 books, The Foundations of Helicopter Flight (Halsted Press, 1994) and Basic Helicopter Aerodynamics (Blackwell, 2nd ed 2001).
目次
Preface to First Edition
Preface to Second Edition
Preface to Third Edition
Notation
Units
Abbreviations
1 Introduction
1.1 Looking Back
References
2 Rotor in Vertical Flight: Momentum Theory and Wake Analysis
2.1 Momentum Theory for Hover
2.2 Non-dimensionalization
2.3 Figure of Merit
2.4 Axial Flight
2.5 Momentum Theory for Vertical Climb
2.6 Modelling the Streamtube
2.7 Descent
2.8 Wind Tunnel Test Results
2.9 Complete Induced-Velocity Curve
2.10 Summary Remarks on Momentum Theory
2.11 Complexity of Real Wake
2.12 Wake Analysis Methods
2.13 Ground Effect
2.14 Brownout
References
3 Rotor in Vertical Flight: Blade Element Theory
3.1 Basic Method
3.2 Thrust Approximations
3.3 Non-uniform Inflow
3.4 Ideal Twist
3.5 Blade Mean Lift Coefficient
3.6 Power Approximations
3.7 Tip Loss
3.8 Examples of Hover Characteristics
References
4 Rotor Mechanisms for Forward Flight
4.1 The Edgewise Rotor
4.2 Flapping Motion
4.3 Rotor Control
4.4 Equivalence of Flapping and Feathering
References
5 Rotor Aerodynamics in Forward Flight
5.1 Momentum Theory
5.2 Descending Forward Flight
5.3 Wake Analysis
5.4 Blade Element Theory
References
6 Aerodynamic Design
6.1 Introductory
6.2 Blade Section Design
6.3 Blade Tip Shapes
6.4 Tail Rotors
6.5 Parasite Drag
6.6 Rear Fuselage Upsweep
6.7 Higher Harmonic Control
6.8 Aerodynamic Design Process
References
7 Performance
7.1 Introduction
7.2 Hover and Vertical Flight
7.3 Forward Level Flight
7.4 Climb in Forward Flight
7.5 Maximum Level Spread
7.6 Rotor Limits Envelope
7.7 Accurate Performance Prediction
7.8 A World Speed Record
7.9 Speculation on the Really Low-Drag Helicopter
7.10 An Exercise in High-Altitude Operation
7.11 Shipborne Operation
References
8 Trim, Stability and Control
8.1 Trim
8.2 Treatment of Stability and Control
8.3 Static Stability
8.4 Dynamic Stability
8.5 Hingeless Rotor
8.6 Control
8.7 Autostabilization
References
9 A Personal Look at the Future
Appendix: Performance and Mission Calculation
Index
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