MJ2485 Introduction to Unsteady aerodynamics 7.5 credits
Introduktionskurs instationär aerodynamik
Please note
The information on this page is based on a course syllabus that is not yet valid.
Education cycle
Second cycleMain field of study
Mechanical Engineering
Grading scale
A, B, C, D, E, FX, F
Course offerings
Autumn 19 for programme students

Periods
Autumn 19 P1 (2.0 credits), P2 (2.5 credits)
Spring 20 P3 (3.0 credits)

Application code
51771
Start date
26/08/2019
End date
14/03/2020
Language of instruction
English
Campus
KTH Campus
Tutoring time
Daytime
Form of study
Normal

Number of places
No limitation
Course responsible
Nenad Glodic <nenad.glodic@energy.kth.se>
Target group
MAndatory for TAETM, only for TAETM
Part of programme
Autumn 18 for programme students

Periods
Autumn 18 P1 (2.0 credits), P2 (2.5 credits)
Spring 19 P3 (3.0 credits)

Application code
51250
Start date
27/08/2018
End date
15/03/2019
Language of instruction
English
Campus
KTH Campus
Tutoring time
Daytime
Form of study
Normal

Number of places
No limitation
Schedule
Course responsible
Nenad Glodic <nenad.glodic@energy.kth.se>
Part of programme
Intended learning outcomes
The course aims at providing students with the fundamental theory of aerodynamics and to introduce students to the unsteady aerodynamics and aeroelasticity.
After completing the course the student will be able to:
 Compute the aerodynamic forces and moments on a profile from a velocity or pressure distribution
 Differentiate between the sources of drag, their cause and characteristics
 Simplify important equations using dimensional analysis
 Calculate the potential flow around a profile using the method of singularities and conformal mapping
 Calculate the aerodynamic forces on a airfoil profile using the thin airfoil theory 
 Understand the link between singularities and panel methods
 Calculate the inviscid aerodynamic forces on a threedimensional wing from its twodimensional characteristics
 Calculate the boundary layer from the potential flow solution
 Determine the best approach to compute the boundary layer (selfsimilar profile, integral method, ...)
 Compare experimental measurements, with theoretical and/or numerical results
 Differentiate between the physics of laminar and turbulent flows
 Determine the characteristics of transition to turbulence and flow separation from the pressure distribution and Reynolds number
 Average important equations using Reynolds approach
 Estimate the aerodynamic forces in the supersonic and transsonic regimes for thin airfoils
 Develop structural equations of motion for linear and nonlinear elastic structures using Hamilton's Principle and Lagrange's equations including the effects of external forces.
Using simplied representations of the aerodynamic forces on an elastic structure, develp the aeroelastic (coupled fluidstructural) equations of motion.
Master methods for solving the aeroelastic equations of motion including the concepts of transfer function for simple harmonic motion in time, Fourier series for periodic motion, Fourier transforms for aperiodic motion and power spectra for random motion.
 Explain physical phenomena of divergence, control surface reversal, flutter and gust response and how they can be described by solutions to computational aeroelastic models and also can be observed in wind tunnel experiments.
 Develop a fundamental understanding of the classical potential flow theory of unsteady aerodynamics.
Course main content
Aerodynamics is the study of fluid flows around or within solid bodies. One of the major objectives of aerodynamics is to predict the forces and moments that are exerted by the fluid on the body, or to predict the heat transfers between the fluid and the body.
The first part of the course presents the most fundamental aspects of aerodynamics. Following topics are covered:
 Aerodynamic forces and moments: lift and drag, pitching moment, airfoil polar, aerodynamic center, center of pressure
 Incompressible potential flows, singularities (vortex, source, doublet), d'Alembert principle, circulation
 Superposition of fundamental solutions, Rankine oval, lifting cylinder, KuttaJoukowski theorem, conformal mapping, complex formalism, Joukowsky airfoil
 Thin airfoil theory: line distribution of singularities, effect of thickness and camber, Kutta condition
 Panel methods: potentialbased, vortexbased, sourcebased, equivalence between source, doublet and vortexbased methods
 3D wings: vortex sheet, Prandtl lifting line theory for large aspect ratio wings, distribution of circulation, induced drag, downwash velocity, elliptic lift distribution, optimal wing, general lift distribution
 Boundary layers: concepts and definitions, boundary conditions, thickness, von Karman integral equation, flow separation and airfoil stall, transition to turbulence
 Laminar boundary layer: selfsimilar solution (Blasius, FalknerSkan), Pohlhaussen method, Thwaites method
 Turbulent boundary layer: transition, characteristics, Reynoldsaveraging, Head method, log law
 Compressible aerodynamics: compressible potential flow, PrandtlGlauert equation, flow past a thin airfoil (subsonic, transonic, supersonic)
The second part of the course focuses on the basics of aeroelasticity or the dynamics of fluidstructure interaction. Following topics are covered:
 Coupled equeation of motion
 Solution to aeroelastic equation of motion
 Static aeroelasticity (divergence, control surface reversal)
 Dynamic aeroelasticity (flutter, gust, forced response)
 Nonsteady aerodynamics of lifting and nonlifting surfaces
Disposition
The course runs over three periods, P1, P2 and P3.
TEND exam after P2 (4.5ECTS), grade AF
TENA exam after P3 (3ECTS), grade AF
Eligibility
Engineering mathematics, BSc level
Turbomachinery MJ2429
Only for TAETM
Literature
"Fundamentals of Aerodynamics", John Anderson Jr., 5th edition, McGraw and Hill, ISBN 9780073398105
"A Modern Course in Aeroelasticity ", Earl H. Dowell, Springer, Fifth Edition, 2015,ISBN 9783319094533
Föreläsningsanteckningar distribueras via Canvas plattformen
"Fundamentals of Aerodynamics", John Anderson Jr., 5th edition, McGraw and Hill, ISBN 9780073398105
"A Modern Course in Aeroelasticity ", Earl H. Dowell, Springer, Fifth Edition, 2015,ISBN 9783319094533
Föreläsningsanteckningar distribueras via Canvas plattformen
Examination
 INL1  Hand in exercise, 3.0, grading scale: A, B, C, D, E, FX, F
 TEND  Examination, 4.5, grading scale: A, B, C, D, E, FX, F
TEN A, 3 ECTS, AF
TEN B, 1,5 ECTS, AF
TEN C, 3 ECTS, AF
Offered by
ITM/Energy Technology
Examiner
Andrew Martin <andrew.martin@energy.kth.se>
Version
Course syllabus valid from: Autumn 2019.
Examination information valid from: Autumn 2019.