AE3701 Wind Tunnel Techniques Syllabus:

AE3701 Wind Tunnel Techniques Syllabus – Anna University Regulation 2021

COURSE OBJECTIVES:

• To learn the Types of low speed Wind tunnels and non-dimensional numbers with its applications.
• To learn the Types of high speed Wind tunnels and with its calibration methods.
• To Understand the Special Wind tunnels and with its calibration methods with its design methods.
• To describe flow visualization techniques and data acquisition methods.
• To understand the functions of various instruments associated with wind tunnel

UNIT I LOW SPEED WIND TUNNELS

Classification –non-dimensional numbers-types of similarities – Layout of open circuit and closed circuit subsonic wind tunnels – design parameters-energy ratio – HP calculations – Calibration methods.

UNIT II HIGH SPEED WIND TUNNELS

Blow down, in draft and induction tunnel layouts and their design features -Transonic, and supersonic tunnels- peculiar features of these tunnels and operational difficulties – sample design calculations and calibration methods.

UNIT III SPECIAL WIND TUNNEL TECHNIQUES

Types of Special Wind Tunnels – Hypersonic, Gun and Shock Tunnels – Design features and calibration methods- Intake tests – store carriage and separation tests – wind tunnel model design for these tests

UNIT IV WIND TUNNEL INSTRUMENTATION

Instrumentation and sensors required for both steady and unsteady measurements – Force measurements using three component and six component balances – calibration of measuring instruments – error estimation and uncertainty analysis.

UNIT V FLOW VISUALIZATION and NON-INTRUSIVE FLOW DIAGNOSTICS

Smoke and Tuft grid techniques – Dye injection special techniques – Oil flow visualization and PSP techniques – Optical methods of flow visualization – PIV and Laser Doppler techniques – Image processing and data deduction

TOTAL: 45 PERIODS
COURSE OUTCOMES:

At the end of the course, students will be able to
CO1: Explain the uses of various types of tunnels and its losses
CO2: Experiment with calibration of different types of high speed tunnels
CO3: Make use of various special tunnels and its applications
CO4: Make use of various measurement techniques of instruments of wind tunnel
CO5: Can use various techniques for aerodynamic data generation

TEXT BOOKS:

1. NAL-UNI Lecture Series 12:” Experimental Aerodynamics”, NAL SP 98 01 April 1998
2. Rae, W.H. and Pope, A., “Low Speed Wind Tunnel Testing”, John Wiley Publication, 1984.

REFERENCES:

1. Bradsaw “Experimental Fluid Mechanics”.
2. Lecture course on Advanced Flow diagnostic techniques 17-19 September 2008 NAL, Bangalore
3. Pope, A., and Goin, L., “High Speed Wind Tunnel Testing”, John Wiley, 1985.
4. Rathakrishnan, E., “Instrumentation, Measurements, and Experiments in Fluids,” CRC Press – Taylor & Francis, 2007.
5. Short term course on Flow visualization techniques, NAL , 2009