AA200b - Applied Aerodynamics II

Course Description

Official Stanford Bulletin Description:

AA200b. Applied Aerodynamics II

Analytical and numerical techniques for the aerodynamic analysis of aircraft, focusing on finite wing theory, far-field and Trefftz-plane analysis, two-dimensional laminar and turbulent boundary layers in airfoil analysis, similarity rules, aerodynamic stability derivatives. Bi-weekly assignments require MATLAB or a suitable programming language. Prerequisite: 200A or equivalent. Recommended: 210A.

3 units, Win (Alonso)

What this really means:

In the past, the AA200 series consisted of three separate courses (a, b, and c) which covered a variety of topics in applied aerodynamics. During the course of the years, this three-course series was reduced to a two-course series, and eventually became AA200a. Due to the varied background of each incoming class in the Department, it has become clear that a follow-up course to AA200a is necessary to meet the needs of students who are already familiar with the topics covered in that course. Thus the revival of AA200b.

AA200b will be taught in subsequent years and will assume familiarity with ALL the contents of AA200a. In particular, I will be assuming that you are familiar with the derivation of the equations of motion for fluid flow (including the compressible Navier-Stokes equations, and all levels of simplification that are typically introduced: Euler, non-linear potential, potential, and Laplace's equations). In addition, I will assume that you have a basic level of understanding of typical applied aerodynamics topics such as airfoil analysis, force coefficients and pressure distributions, basic lifting line theory, and basic concepts of boundary layers, flow separation, and aerodynamic performance.

During this course we will attempt to obtain a firmer grasp of some of the fundamental areas of aerodynamics that can be used to guide the design of two-dimensional airfoils and three-dimensional wings. In particular, I will initially concentrate on the following topics:

Use of potential- and vortex-based panel methods with applications to the solution of two-dimensional lifting and non-lifting flows.
Compressibility corrections.
Boundary layer theory.
BL + potential flow solution methods.
Finite wing theory and vortex lattice methods.
Configuration aerodynamics / multiple lifting surfaces.
Inverse design methods (based on potential and BL + potential flows).

Throughout the course you will be given several computational assignments which will, incrementally, attempt to implement a potential + BL coupled solution method and a 3D induced drag design problem. Additional problems will be handed out to address theoretical concepts covered during class.

If, upon coming to Stanford, you are already familiar with the contents of AA200a, you may substitute AA200b (for AA200a) to satisfy the requirements in your Masters degree proposal.

Instructor

Juan J. Alonso
Durand Bldg. Room 365
Department of Aeronautics & Astronautics
Stanford University
Stanford, CA 94305

e-mail: jjalonso@stanford.edu
Tel: (650) 723-9954
Fax: (650) 725-3377

Office Hours

TBD

Course Syllabus

A tentative syllabus for the course can be found below.

Date	Lecture No.	Topic	Lecture Notes

1/4	1	Introduction. Airfoil Characteristics. Airfoil Design Problems.	Lecture 1 notes
1/6	2	Lifting Airfoils in Incompressible Irrotational Flow	Lecture 2 notes
1/11	3	Lifting Airfoils and the Hess-Smith Panel Method	Lecture 3 notes
1/13	4	The Hess-Smith Panel Method and Airfoil Characteristics	Lecture 4 notes
1/18	5	Supersonic Thin Airfoil Theory	Lecture 5 notes
1/20	6	The Boundary Layer Approximation	Lecture 6 notes
1/25	7	Analytic Solutions and the VonKarman Integral Momentum Equations	Lecture 7 notes
1/27	8	Integral Solution of Laminar Flows - Thwaites' Method	Lecture 8 notes
2/1	9	Turbulent Boundary Layers and Their Integral Solution	Lecture 9 notes
2/3	10	Transition Prediction and Modelling.	Lecture 10 notes
2/8	11	MIDTERM EXAM
2/10	12	Airfoil Design Methods and Examples	Lecture 12 notes
2/15	13	The Finite Wing. Introduction to Induced Drag	Lecture 13 notes
2/17	14	Finite-Wing Details. Non-Elliptic Spanload Distributions	Lecture 14 notes
2/22	15	Induced Drag Computation in the Trefftz Plane	Lecture 15 notes
2/24	16	Induced Drag Computation in the Trefftz Plane (2)	Lecture 16 notes
3/1	17	Induced Drag Minimization	Lecture 17 notes
3/3	18	Non-planar and Multiple Lifting Surface Configurations. Winglets	Lecture 18 notes
3/8	19	Wing Design - Lift Distributions and Performance	Lecture 19 notes
3/10	20	Aerodynamic Shape Optimization Using the Euler and Navier-Stokes Equations	Lecture 20 notes

AA200b Mailing List

A mailing list for the entire class has been setup which we will use to make important announcements and to communicate with each other.

Please sign up whenever you have a chance. In order to sign up, simply send an e-mail message to:

majordomo@lists.stanford.edu

and in the body of the message put the following single line:

subscribe aa200b

if you want to unsubscribe from the mailing list, simply send an e-mail message to the same address with the following line:

unsubscribe aa200b

The list will be deleted at the end of the quarter; after classes are over you should not be receiving any more messages from this list.

Useful References

The following is a list of useful references (none of which are required) for the material covered in AA200b. The titles in boldface are recommended, although not required. I will be handing out all of the necessary reading assignments in class, but you may want to complement this material with the contents of some of these books.

Introduction to Theoretical and Computational Aerodynamics. Jack Moran. John Wiley and Sons, 1984. - Although out of print, this book is clearly written, contains clear explanations of a variety of topics, and provides descriptions of the computational implementations of various panel methods and integral boundary layer formulations.
Foundations of Aerodynamics - Bases of Aerodynamic Design, 5th Ed. A. Kuethe and C. Chow, John Wiley and Sons, 1998. - Another good book in applied aerodynamics with broad, in-depth coverage (broader than we will pursue in AA200b) of a variety of topics. Good description of finite wing theory and compressible boundary layers.
Fundamentals of Aerodynamics. J. D. Anderson, McGraw Hill, 1991. - Good, although not as in-depth as the previous ones, description of multiple topics in applied aerodynamics. Excellent illustrations and sample problems. Best as a first book in Applied Aero.
Boundary Layer Theory, 7th Ed. H. Schlichting, McGraw Hill, 1987. - The reference for boundary layer theory. Comprehensive but not organized in the clearest of ways. A classic.
Incompressible Aerodynamics. B. Thwaites, Dover, 1960. - Comprehensive, although a bit outdated reference. Pretty inexpensive.
Viscous Fluid Flow. F. M. White, McGraw Hill, 1974. - Comprehensive. A bit more modern than Thwaites, but more of a reference for viscous fluid flow than a textbook.

Web Links

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AA205 Course Notes by Ilan Kroo

Last Modified: Mon Jan 3 15:19:36 PST 2005
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