18AE42 Aerodynamics –I syllabus for AE

Review of Basic Fluid Mechanics

Continuity, momentum and energy equation, Control volume approach to Continuity, momentum and energy equation, Types of flow, pathlines, streamlines, and streaklines,units and dimensions, inviscid and viscous flows, compressibility, Mach number regimes. Vorticity, Angular velocity, Stream function, velocity potential function, Circulation, Numericals, Mach cone and Mach angle, Speed of sound.

Airfoil Characteristics

Fundamental aerodynamic variables, Airfoil nomenclature, airfoil characteristics. wing planform geometry, aerodynamic forces and moments, centre of pressure, pressure coefficient, aerodynamic center, calculation of airfoil lift and drag from measured surface pressure distributions, typical airfoil aerodynamic characteristics at low speeds. Types of drag-Definitions.

Two Dimensional Flows & Incompressible Flow Over Airfoil

Uniform flow, Source flow, Sink flow, Combination of a uniform flow with source and sink. Doublet flow. Non-lifting flow over a circular cylinder. Vortex flow. Lifting flow over a circular cylinder. Kutta-Joukowski theorem and generation of Lift, D’Alembert’s paradox, Numericals,

Incompressible flow over airfoils:

Kelvin’s circulation theorem and the starting vortex, vortex sheet, Kutta condition, Classical thin airfoil theory for symmetric and cambered airfoils. Numericals.

Biot-Savart law and Helmholtz’s theorems, Vortex filament: Infinite and semi-infinite vortex filament, Induced velocity. Prandtl’s classical lifting line theory: Downwash and induced drag. Elliptical and modified elliptical lift distribution. Lift distribution on wings. Limitations of Prandtl’s lifting line theory. Extended lifting line theory- lifting surface theory, vortex lattice method for wings. Lift, drag and moment characteristics of complete airplane.

Applications of Finite Wing Theory & High Lift Systems

Simplified horse-shoe vortex model, formation flight, influence of downwash on tail plane, ground effects. Swept wings: Introduction to sweep effects, swept wings, pressure coefficient, typical aerodynamic characteristics, Subsonic and Supersonic leading edges. Introduction to high-lift systems, flaps, leading-edge slats and typical high – lift characteristics. critical Mach numbers, Lift and drag divergence, shock induced separation, Effects of thickness, camber and aspect ratio of wings, Transonic area rule, Tip effects. Introduction to Source panel & vortex lattice method.

Course Outcomes:

At the end of the course the student will be able to:

1. CO1 :Evaluate typical airfoil characteristics and two-dimensional flows over airfoil

2. CO2 :Compute and analyse the incompressible flow over finite wings

3.CO3 : Apply finite wing theory and design high lift systems from the aerodynamics view point

Question paper pattern:

• The question paper will have ten full questions carrying equal marks. Each full question consisting of 20 marks
• There will be two full questions (with a maximum of four sub questions) from each module.
• Each full question will have sub question covering all the topics under a module.
• The students will have to answer five full questions, selecting one full question from each module.

Textbook/s

1 Fundamental of Aerodynamics Anderson J.D McGraw-Hill International Edition, New York 5th edition,2011

2 Aerodynamics for Engineering Students E. L. Houghton, P.W. Carpenter Elsevier, New York 5th edition,2010

Reference Books

3 Aerodynamics Clancy L. J. Sterling book house, New Delhi 2006

4 Theoretical Aerodynamics Louis M. Milne- Thomson Dover Publications, USA Imported Edition,2011