AME 33033Aerodynamics Laboratory

Spring 2008

Instructor: Robert C. Nelson

Office: 106 Hessert Laboratory

Telephone: 574-631-4733

email: rnelson@nd.edu

Office hours: By appointment

Laboratory Experiments

• Lab Groups will be assigned.

• Your Lab group time will be selected on the Friday before the week the laboratory is scheduled.

• Read the Laboratory Handout before coming to the Lab.

• All Experiments will be performed in tunnels at the Hessert Lab.

What is a wind tunnel?

• A wind tunnel is a device that can be used to test aerospace vehicles or their components under controlled conditions.

From Wind Tunnel Testing by Pope

Why do we need experimental facilities like wind tunnels?

• Wind tunnels are used to obtain aerodynamic information on aircraft bridges, buildings, automobiles and various other objects.

• Wind tunnels have been designed for a wide range of flight speeds.

• What type of information can we gain from a wind tunnel test and why is it important?

Minimizing Design Risk

• Wind tunnels help designers to build confidence in their design.

• Experiments provide information so that the designer and corporate leaders can confidently commit to a major new development program.

What does it cost to build a new Subsonic Jet Transport?

• Design time for a new transport aircraft is approximately 4.5 years.

• The Company must pay thousands of engineers and support people to design and develop the airplane.

• For example, Airbus has probably had to mortgage the net worth of the company to finance the development of the A380.

• If the A380 is not successful the Airbus would be in big trouble financially.

Airbus A380

• Gross weight 1.2 million pounds

• 555 to 840 passengers

• Maximum range 10,000 miles

• 20% more efficient than B747-400

Course Goals

• To understand how experimental techniques can be used to provide improved understanding of aerodynamic phenomena.

• To appreciate ethical issues dealing with experimental studies.

• To be able to critical assess experimental information.• To be able to present your results in a well written

technical report.• To be able to present a good oral presentation of your

work.• To be able to work effectively as a member of the

team.• To be able to design an experiment.

Course Handouts

• Course Schedule

• Course Policy

• Report Format

• Peer Review report

• Laboratory handout

• Supplemental material

Course Policy

• You must attend your assigned laboratory session. Failure to do so will result in a zero for that laboratory exercise.

• Laboratory reports must be turned in on time. Late reports will be penalized.

• For the individual lab report you will collect the data as a group but you must not collaborated with anyone in analyzing the data or in writing up your report. Failure to do so will be an honor code violation.

• For group laboratory reports you should work as a team to collect, analyze, interpret and document your results in a clearly written technical report.

Grading

• Four group lab reports* @ 10% each 40%• One individual lab report 10%• One group oral presentation

10%• Quizzes

20%• Examine

20%• TOTAL

100%

Aerodynamics Lab TAs

• Jacob Cress B028 Hessert

• David Schatzman 115 Hessert

• Zachary Zikoski 321 Cushing

• Ahaddy Abado 117 Hessert

Aerodynamics Laboratory Experiments

• Force balance measurements on an airfoil.

• Pressure Distribution over an airfoil.

• Boundary Layer measurement over a flat plate.

• Measurement of propeller thrust and Torque.

• Measurement of finite wing aerodynamics.

Course Schedule

Class Schedule for AME 30333 Aerodynamics Laboratory Spring 2008Week Monday Wednesday Friday

15-Jan Introduction Ethical Issues in experimentation

22-Jan Experimental Airfoil Aerodynamics Dimensional Analysis Measurement of Aero Coefficients

29-Jan Thin airfoil theory Thin airfoil theory Wind Tunnel CorrectionsAero Lab Experiment #1 Aero Lab Experiment #1 Aero Lab Experiment #1

5-Feb Discussion of Lab #1 Quiz # 1 Prediction of pressure distribution over Prediction of aerofoil aerodynamic

Wind Tunnel Corrections an Airfoil coefficients from pressure dataan airfoil12-Feb Making pressure measurements Different Types of Aerodynamic Testing Flow Visualization Techniques

Lab Report # 1 dueAero Lab Experiment #2 Aero Lab Experiment #2 Aero Lab Experiment #2

19-Feb Discussion of Lab #2 Boundary layer theory Boundary Layer measurementsGetting Quantitative data from Flow Viz Quiz #2

26-Feb Boundary layer theory Boundary layer theory Propeller TheoryLab Report # 2 due

Aero Lab Experiment #3 Aero Lab Experiment #3 Aero Lab Experiment #3

4-Mar Semester Break Semester Break Semester Break

11-Mar Discussion of Lab #3 Propeller Theory Wind Turbines

Propeller Theory Quiz # 3

18-Mar Wind Turbines Finite Wing Theory Good FridayLab Report #3 Due No Class

25-Mar Easter Holiday Discussion of Lab #3 Quiz #4 Finite Wing Aerodynamics

Finite Wing Aerodynamics Finite Wing Theory Finite Wing Theory1-Apr Aero Lab Experiment #4 Aero Lab Experiment #4 Aero Lab Experiment #4

8-Apr Discussion Lab #4 Quiz # 5 Wind Tunnel Corrections No Class

15-Apr Lab Report # 4 Due No Class Design of Experiments-Class Exercise Design of Experiments-Class ExerciseAero Lab Experiment #5 Aero Lab Experiment #5 Aero Lab Experiment #5

22-Apr Discussion of Lab # 5 Quiz #6 Ethical Issues in experimentation review No ClassUnique Wind Tunnels

29-Apr No Class ExaminationLab Report # 5 Due