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Posts
- Category: Principles of Helicopter Aerodynamics Second Edition (continued)
- Stall Control
- Prediction of In-Flight Airloads
- Time-Varying Velocity Effects on Dynamic Stall
- Three-Dimensional Effects on Dynamic Stall
- Effect of Airfoil Shape on Dynamic Stall
- Effects of Sweep Angle on Dynamic Stall
- Torsional Damping
- Future Modeling Goals with Semi-Empirical Models
- Semi-Empirical Models of Dynamic Stall
- . Modeling of Dynamic Stall
- Effects of Forcing Conditions on Dynamic Stall
- Dynamic Stall in the Rotor Environment
- Flow Morphology of Dynamic Stall
- Dynamic Stall
- Chapter Review
- Methods of Rotor Noise Reduction
- Comparison of Aeroacoustic Methods
- BVI Acoustic Model Problem
- Ffowcs Williams-Hawkings Equation
- Trace or Phase Mach Number
- Compactness
- Wave Tracing
- Principles of Noise Produced by Unsteady Forces
- Comparison with Measurements
- Subsonic Flow Theory
- Incompressible Flow Theory
- Unsteady Aerodynamics of Flaps
- Time-Varying Incident Mach Number
- Convecting Vertical Gusts in Subsonic Flow
- Blade-Vortex Interaction (BVI) Problem
- . Response to an Arbitrary Vertical Gust
- Approximations to the Sharp-Edged Gust Functions
- Nonuniform Vertical Velocity Fields
- Comparison with Experiment
- State-Space Aerodynamic Model for Compressible Flow
- . Unsteady Axial Force and Airfoil Drag
- Indicial Pitching Moment from Angle of Attack
- Determination of Indicial Function Coefficients
- Indicial Lift from Pitch Rate
- Indicial Lift from Angle of Attack
- Approximations to the Indicial Response
- Indicial Method for Subsonic Compressible Flow
- State-Space Solution for Arbitrary Motion
- Recurrence Solution to the Duhamel Integral
- General Application of the Indicial Response Method
- Time-Varying Incident Velocity
- Traveling Sharp-Edged Gust: Miles’s Problem
- Sharp-Edged Gust: Kiissner’s Problem
- Indicial Response: Wagner’s Problem
- Sinusoidal Gust: Sears’s Problem
- The Returning Wake: Loewy’s Problem
- Pitching Oscillations
- Pure Plunging Oscillations
- Pure Angle of Attack Oscillations
- . Theodorsen’s Theory
- Principles of Quasi-Steady Thin-Airfoil Theory
- Unsteady Attached Flow
- Reduced Frequency and Reduced Time
- Concepts of the Blade Wake
- Sources of Unsteady Aerodynamic Loading
- Unsteady Airfoil Behavior
- Chapter Review
- Effects of Damage on Airfoil Performance
- Very Low Reynolds Number Airfoil Characteristics
- Circulation Controlled Airfoils
- High Angle of Attack Range
- Beddoes Method
- Direct Curve Fitting
- Nonlinear Aerodynamic Models
- Representing Static Airfoil Characteristics
- Advanced Rotor Airfoil Design
- Effects of Mach Number
- Effects of Reynolds Number
- Maximum Lift and Stall Characteristics
- . Reflexed Airfoils
- Use of Trailing Edge Tabs
- Effect of Airfoil Shape on Hitching Moment
- Center of Pressure
- . Pitching Moment and Related Issues
- Representative Force and Moment Results
- Pressure Integration
- Aerodynamics of a Representative Airfoil Section
- Measurements of Chordwise Pressure
- Synthesis of Chordwise Pressure
- Airfoil Pressure Distributions
- Airfoil Shape Definition
- Model Rotor Similarity Parameters
- Mach Number
- Concept of the Boundary Layer
- Reynolds Number and Mach Number Effects
- Helicopter Rotor Airfoil Requirements
- Aerodynamics of Rotor Airfoils
- Chapter Review
- Hovering Micro Air Vehicles
- Human-Powered Helicopter
- Smart Rotor Systems
- Other High-Speed Concepts
- Tilt-Rotors
- High-Speed Rotorcraft
- NOTAR Design