The goal of this course is for students to learn how to plan and conduct experimental research in a wind tunnel, as well as analyze the obtained data. The student will deepen their understanding of the basic physical phenomena of airflow and their impact on aircraft performance. Additionally, this course provides students with an opportunity to observe aerodynamic phenomena studied in previous courses directly; students will be introduced to practical problems of experimental aerodynamics and data obtained through experiments as well as its further processing;

The student acquires the ability to independently engage in scientific research as well as to design and conduct experimental research in the wind tunnel and then publish the obtained results. Students are introduced to the use of modern measuring equipment and different measuring techniques for the purpose of obtaining aerodynamic data while understanding the inherent limitations of each technique; Students are trained to critically analyze the results of their experiments and present them in a concise and logical form, both in writing and orally; Comparisons between experimental and computer numerical results are used to give the student experience in deciding which type of research is most suitable for different problems.

1. Introduction 2. Aerodynamic testing of objects 3. Data acquisition 4. Aerodynamic measurement techniques 5. Measurement of force and moment 6. Pressure measurement 7. Temperature measurement 8. Velocity measurement: a) Hot-wire Anemometry; b) Laser Doppler Velocimetry (LDV); c) Particle Image Velocimetry (PIV) 9. Measurement of the boundary layer 10. Flow visualization 11. Wind tunnel corrections 12. Other measurement techniques

Laboratory exercises follow theoretical lectures and are based on several projects. Each project is initiated in a lecture and students independently or in small groups make initial assessments and plan a wind tunnel test. The planned tests are adapted and performed in the available laboratory, and then the obtained data are collected, analyzed and processed.

There are no special conditions

Laboratory for Aerotechnics - Wind Tunnel Miroslav Nenadović Hot-wire Anemometry Laser Doppler Velocimetry (LDV) Particle Image Velocimetry (PIV)

Total assigned hours: 65

New material: 40
Elaboration and examples (recapitulation): 10

Auditory exercises: 0
Laboratory exercises: 0
Calculation tasks: 0
Seminar paper: 0
Project: 0
Consultations: 0
Discussion/workshop: 0
Research study work: 0

Review and grading of calculation tasks: 0
Review and grading of lab reports: 5
Review and grading of seminar papers: 0
Review and grading of the project: 5
Test: 0
Test: 0
Final exam: 5

Activity during lectures: 10
Test/test: 0
Laboratory practice: 30
Calculation tasks: 0
Seminar paper: 0
Project: 30
Final exam: 30
Requirement for taking the exam (required number of points): 40

Barlow J.B., Low-speed Wind Tunnel Testing, John Wiley & Sons, Canada, 1999.; Pope A., Goin K.L., High-speed Wind Tunnel Testing, John Wiley & Sons, New York, 1965.