AO4003 Experimental Aerodynamics Syllabus:
AO4003 Experimental Aerodynamics Syllabus – Anna University PG Syllabus Regulation 2021
COURSE OBJECTIVES:
1. This course will enable the students to learn basics of wind tunnel operation and its associated measurements.
2. To present the concepts of different flow visualization methods.
3. This course also imparts knowledge on flow measurement variables
4. This course enables students to be familiar with data acquisition methods pertaining to experiments in aerodynamics.
5. This course will help students to do uncertainty analysis for their experiments.
UNIT I LOW SPEED TUNNEL
Objective of experimental studies, Types of wind tunnels, Low speed tunnel, Energy ratio, Power losses in a wind tunnel – Calibration of subsonic wind tunnels – Speed Setting – Flow Direction – Three-Hole and Five-Hole Yaw Probes – Turbulence – Wind tunnel balance – Water tunnel.
UNIT II HIGH SPEED TUNNEL
Transonic wind tunnel – Transonic Test Section – Supersonic wind tunnels – Losses in Supersonic Tunnels – Supersonic Wind Tunnel Diffusers– Effects of Second Throat – Runtime calculation –Calculating Air Flow Rates –Calibration of Supersonic Wind Tunnels – Hypersonic wind tunnel and Calibration –Ludwieg Tube – Shock tube and shock tunnels – Gun tunnel – Plasma arc tunnels – Measurement of shock speed.
UNIT III FLOW VISUALIZATION TECHNIQUES
Visualization techniques – Smoke tunnel –-Dye Injection –Bubble Techniques –Surface Flow Visualization techniques – oil – Tufts –China Clay – Ultraviolet Fluorescence Photography – Interferometer – Fringe-Displacement method – Shadowgraph –Schlieren system – Background Oriented Schlieren (BOS) system – Laser sheet flow visualization.
UNIT IV MEASUREMENTS OF PROPERTIES
Pressure measurement techniques-Pitot, Static, and Pitot-Static Tubes-Pitot-Static tube characteristics – Pressure Sensitive Paints – Pressure transducers – Velocity measurements – Hot-wire anemometry-Constant current and Constant temperature Hot-Wire anemometer – Hotfilm anemometry – Laser Doppler Velocimetry (LDV) – Particle Image Velocimetry (PIV)- Temperature measurements – Measurement of heat flux – Foil type heat flux gauge –Transient analysis of foil gauge– Thin film sensors – Slug type heat flux sensor.
UNIT V DATA ACQUISITION SYSTEMS AND UNCERTAINTY ANALYSIS
Data acquisition and processing – Signal conditioning – Statistical analysis of experimental data – Regression analysis – Estimation of measurement errors – Uncertainty calculation – Uses of uncertainty analysis.
TOTAL: 45 PERIODS
COURSE OUTCOMES:
Upon completion of this course, students will
CO1: Have knowledge on measurement of flow properties in wind tunnels and their associated instrumentation.
CO2: Be able to demonstrate and conduct experiments related to subsonic and supersonic flows.
CO3: Gain idea on flow visualization of subsonic and supersonic flows.
CO4: Be familiar with calibration of transducers and other devices used for flow measurement.
CO5: Be able to estimate errors and to perform uncertainty analysis of the experimental data.
REFERENCES:
1. Allan Pope and Kenneth L Goin, “High Speed Wind Tunnel Testing”, Krieger Publishing Company, 1978.
2. Jewel B. Barlow, Willian. H.Rae and Allan Pope,“Low-Speed Wind Tunnel Testing”, WileyInterscience, 3rd edition, 1999.
3. Rathakrishnan, E, “Instrumentation, Measurements, and Experiments in Fluids”, CRC Press –Taylor & Francis, 2020.
4. Robert B Northrop, “Introduction to Instrumentation and Measurements”, Second Edition, CRC Press, Taylor & Francis, 2017.