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AE1303 AERODYNAMICS – II 3 0 0 100
OBJECTIVE
To understand the behaviour of airflow both internal and external in compressible flow regime with particular emphasis on supersonic flows.
1. ONE DIMENSIONAL COMPRESSIBLE FLOW 7
Energy, Momentum, continuity and state equations, velocity of sound, Adiabatic steady state flow equations, Flow through converging, diverging passages, Performance under various back pressures.
2. NORMAL, OBLIQUE SHOCKS AND EXPANSION WAVES 15
Prandtl equation and Rankine – Hugonoit relation, Normal shock equations, Pitot static tube, corrections for subsonic and supersonic flows, Oblique shocks and corresponding equations, Hodograph and pressure turning angle, shock polars, flow past wedges and concave corners, strong, weak and detached shocks, Rayleigh and Fanno Flow. Flow past convex corners, Expansion hodograph, Reflection and interaction of shocks and expansion, waves, Families of shocks, Methods of Characteristics, Two dimensional supersonic nozzle contours.
3. DIFFERENTIAL EQUATIONS OF MOTION FOR STEADY COMPRESSIBLE FLOWS 9
Small perturbation potential theory, solutions for supersonic flows, Mach waves and Mach angles, Prandtl-Glauert affine transformation relations for subsonic flows, Linearised two dimensional supersonic flow theory, Lift, drag pitching moment and center of pressure of supersonic profiles.
4. AIRFOIL IN HIGH SPEED FLOWS 6
Lower and upper critical Mach numbers, Lift and drag divergence, shock induced separation, Characteristics of swept wings, Effects of thickness, camber and aspect ratio of wings, Transonic area rule, Tip effects.
5. HIGH SPEED WIND TUNNELS 8
Blow down, indraft and induction tunnel layouts and their design features, Transonic, supersonic and hypersonic tunnels and their peculiarities, Helium and gun tunnels, Shock tubes, Optical methods of flow visualization.
TOTAL : 45
TEXT BOOK
1. Rathakrishnan, E., “Gas Dynamics”, Prentice Hall of India, 2003.
REFERENCES
1. Shapiro, A.H., “Dynamics and Thermodynamics of Compressible Fluid Flow”, Ronold Press, 1982.
2. Zucrow, M.J. and Anderson, J.D., “Elements of gas dynamics”, McGraw-Hill Book Co., New York, 1989.
3. Mc Cornick. W., “Aerodynamics, Aeronautics and Flight Mechanics”, John Wiley, New York, 1979.
4. Anderson Jr., D., – “Modern compressible flows”, McGraw-Hill Book Co., New York 1999
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