Total: 24hs
| NATIONAL AEROSPACE UNIVERSITY
KhAI
|
| 17, Chkalov St. Kharkiv
61070, UKRAINE
Tel: +380-57-7449-856,
Fax +380-57-7441-131, Email: khai@khai.edu
| Attachment 3.
Flight characteristics of helicopter
Lectures
|
| No
| Contents
| Hours
|
| Lecture 1.
| Introduction in Helicopter Aerodynamics.
| 2hs
|
| Lecture 2.
| Aerodynamics of airfoil, main features and definitions (dynamic and kinematic parameters of flow, similarity parameters of flow). Geometrical parameters of airfoil. Aerodynamic forces and moments. Factors of aerodynamic forces and moments.
| 2hs
|
| Lecture 3.
| Analysis of aerodynamic characteristics of airfoil in Gas Subsonic Flow. Center of Pressure and Aerodynamic center. Pressure Distribution Over Airfoil Surface. Analysis of Aerodynamic Characteristics of Thin Airfoil in Gas Supersonic Flow
| 2hs
|
| Lecture 4.
| Rotor of Helicopter. General characteristics (modes of funning, angle of attack). Geometrical characteristics (blade spacing, blade twist, blade swept area). Other characteristics (specific load, fill factor, operation mode factor).
| 2hs
|
| Lecture 5.
| Rotor in vertical flight. Ideal rotor. Momentum Theory in vertical Flight. Blade Element Theory for vertical flight (Flow velocities at a blade element, climb, descent, “vortex ring” mode, autorotation mode). Resistant forces acted on the rotor. Thrust and torque characteristics of rotor, hover characteristics. Compensation of reactive moment. Available power of rotor. Transition to real rotor (non-uniform inflow, tip losses, blade mean lift coefficient).
| 6hs
|
| Lecture 6.
| Rotor aerodynamics in forward flight. Wake analysis. Momentum theory. Blade element theory. Flapping and lagging of blade. Rotor control, feathering. Rotor forces and choice of axes.
| 6hs
|
| Lecture 7.
| Flight performances of helicopter. Methods of aerodynamic calculation. Method of Powers.
| 2hs
|
| Lecture 8.
| Hover and vertical flight. Static and service ceiling. Barogram of vertical climb.
| 2hs
|
| Lecture 9.
| Forward flight. Minimum, economic, optimal and maximum speed. Barogram of climb.
| 3hs
|
| Lecture 10.
| Diagram of possible modes of flight. Restrictions of flight velocity.
| 2hs
|
| Lecture 11.
| Conclussions.
| 1hs
|
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