AO4016 Helicopter Aerodynamics Syllabus:
AO4016 Helicopter Aerodynamics Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
1. This course will make students to provide with introductory concepts of types of rotorcraft.
2. This course imparts knowledge on the fundamental aspects of helicopter aerodynamics and performance of helicopters.
3. This course will provide basic knowledge on the performance of helicopters.
4. This course presents stability and control aspects of helicopters.
5. This course will explorethe basic aerodynamic design aspects of helicopters.
UNIT I INTRODUCTION
Types of rotorcraft – autogyro, gyrodyne, helicopter, Main rotor system – articulated, semi rigid, rigid rotors, Collective pitch control, cyclic pitch control, anti torque pedals.
UNIT II HELICOPTER AERODYNAMICS
Momentum / actuator disc theory, Blade element theory, combined blade element and momentum theory, vortex theory, rotor in hover, rotor model with cylindrical wake and constant circulation along blade, free wake model, Constant chord and ideal twist rotors, Lateral flapping, Coriolis forces, reaction torque, compressibility effects, Ground effect.
UNIT III PERFORMANCE
Hover and vertical flight, forward level flight, Climb in forward flight, optimum speeds, Maximum level speed, rotor limits envelope – performance curves with effects of altitude
UNIT IV STABILITY AND CONTROL
Helicopter Trim, Static stability – Incidence disturbance, forward speed disturbance, angular velocity disturbance, yawing disturbance, Dynamic Stability.
UNIT V AERODYNAMIC DESIGN
Blade section design, Blade tip shapes, Drag estimation – Rear fuselage upsweep, vibration problem of Helicopter blades.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, students will be able to
CO1: Describe and compare possible helicopter structures and configurations.
CO2: Identify features of aerodynamic components of rotary wing aircraft and its performance.
CO3: Describe the aerodynamic characteristics that affect rotary wing flight.
CO4: Idea about the factors that influence helicopter stability.
CO5: Gain knowledge of helicopter controls and vibration analysis of helicopter blades.
REFERENCES:
1. Gessow.A and Meyers,GC,“Aerodynamics of the Helicopter”, Macmillan and Co., New York,1982.
2. John Fay, “The Helicopter”, Himalayan Books, New Delhi, 1995.
3. Lalit Gupta, “Helicopter Engineering”, Himalayan Books, New Delhi, 1996.
4. Lecture Notes on Helicopter Technology, Department of Aerospace Engineering, IIT – Kanpur and Rotary Wing aircraft R&D center, HAL, Bangalore, 1998.
5. Seddon,J,“Basic Helicopter Aerodynamics”, AIAA Education series, Blackwell scientific publications, U.K, 1990.