AE 6070 Rotorcraft Aerodynamics

Course Outline

PowerPoint Presentations

• Part 1
• Part 2 Using Matlab to analytically integrate blade loads (Sample Script)
• Part 3
• Inflow Models
• Part 4
• Introduction to Rotorcraft Aeroacoustics

Supplementary Material IV: Class Notes (Word Form)

• Introductory Remarks
• Blade Element Theory (Hover)
• Combined Blade Element Momentum Theory
• Coning Angle in Hover
• Angle of Attack of a Blade Element in Forward Flight
• Coning Angle in Forward Flight
• Prescribed Wake Models for Rotors in Forward Flight
• Tip path Plane Loads
• Prescribed Wake Hover Analysis (MATLAB code)

Some useful Classics:

· Bailey, NACA Report 716

· Gessow et al, NACA Report 1266

· Castles, et al NASA Report 1184, 1954

· Heyson, et al NASA Report 1319

· Helicopter Height Velocity Diagram Computation Procedure: NACA TN D 4536

Some Recent work on Free Wake Methods and Applications

· Wayne Johnson’s paper on CAMRAD II

· Penn State U Master’s Thesis on development of a Freewake Method

· Application of a Free Wake Method to Vibration Reduction using Trailing Edge Flaps

· Application of CAMRAD II to Model Apache Helicopter

· Application of CAMRAD II to Model Large Helicopters

· Application of CAMRAD II to UH-60A Black Hawk Helicopter

· NASA TM 2000-209601 Airfoil Dynamics Stall and Rotorcraft Maneuverability

Some papers on aeroacoustics

· Paper by Brentner and Farassat

· Paper by Brentner and Lyrintzis comparing FWH Method and Kirchhoff Method