JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Pre-Requisites

Aerodynamics

Course Objectives:

• The students are exposed to various types and techniques of Aerodynamic data generation on aerospace vehicle configurations in the aerospace industry.

Course Outcomes:

• Ability to use various techniques of Aerodynamic data generation

UNIT - I

Principles of Model Testing: Buckingham Theorem – Non dimensional numbers – Scale effect – Geometric Kinematic and Dynamic similarities.

UNIT - II

Types and Functions of Wind Tunnels: Classification and types – special problems of testing in subsonic, transonic, supersonic and hypersonic speed regions – Layouts – sizing and design parameters.

UNIT - III

Calibration of Wind Tunnels: Test section speed – Horizontal buoyancy – Flow angularities – Flow uniformity & turbulence measurements – Associated instrumentation – Calibration of subsonic & supersonic tunnels.

UNIT - IV

Conventional Measurement Techniques: Force measurements and measuring systems – Multi component internal and external balances –Pressure measurement system - Steady and Unsteady Pressure- single and multiple measurements - Velocity measurements – Intrusive and Non-intrusive methods – Flow visualization techniques surface flow, oil and tuft - flow field visualization, smoke and other optical and nonintrusive techniques

UNIT - V

Special Wind Tunnel Techniques: Intake tests – store carriage and separation tests - Unsteady force and pressure measurements –wind tunnel model design

TEXT BOOKS:

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

REFERENCE BOOKS:

• 1. Pope, A., and Goin, L., "High Speed Wind Tunnel Testing", John Wiley, 1985.
• 2. Bradsaw "Experimental Fluid Mechanics".
• 3. Short term course on Flow visualization techniques, NAL , 2009
• 4. Lecture course on Advanced Flow diagnostic techniques 17-19 September 2008 NAL, Bangalore.