AE2255 PROPULSION AE 2255 PROPULSION

AE2255 PROPULSION – I  SYLLABUS 3 0 0 3 OBJECTIVE

To understand the principles of operation and design of aircraft and spacecraft power

plants.

1. FUNDAMENTALS OF GAS TURBINE ENGINES 12

Illustration of working of gas turbine engine – The thrust equation – Factors affecting

thrust – Effect of pressure, velocity and temperature changes of air entering compressor

– Methods of thrust augmentation – Characteristics of turboprop, turbofan and turbojet –

Performance characteristics.

2. SUBSONIC AND SUPERSONIC INLETS FOR JET ENGINES 8

Internal flow and Stall in subsonic inlets – Boundary layer separation – Major features of

external flow near a subsonic inlet – Relation between minimum area ratio and eternal

deceleration ratio – Diffuser performance – Supersonic inlets – Starting problem on

supersonic inlets – Shock swallowing by area variation – External declaration – Models

of inlet operation.

3. COMBUSTION CHAMBERS 6

Classification of combustion chambers – Important factors affecting combustion

chamber design – Combustion process – Combustion chamber performance – Effect of

operating variables on performance – Flame tube cooling – Flame stabilization – Use of

flame holders – Numerical problems.

4. NOZZLES 6

Theory of flow in isentropic nozzles – nozzles and choking – Nozzle throat conditions –

Nozzle efficiency – Losses in nozzles – Over expanded and under – expanded nozzles –

Ejector and variable area nozzles – Interaction of nozzle flow with adjacent surfaces –

Thrust reversal.

5. COMPRESSORS 13

Principle of operation of centrifugal compressor – Work done and pressure rise –

Velocity diagrams – Diffuser vane design considerations – Concept of prewhirl, rotation

stall and surge – Elementary theory of axial flow compressor – Velocity triangles –

degree of reaction – Three dimensional – Air angle distributions for free vortex and

constant reaction designs – Compressor blade design – Centrifugal and Axial

compressor performance characteristics.

TOTAL : 45

TEXT BOOKS

1. Hill, P.G. & Peterson, C.R. “Mechanics & Thermodynamics of Propulsion”

Addison – Wesley Longman INC, 1999. (VISIT                http://aimforhigh.blogspot.com)

REFERENCES

1. Cohen, H. Rogers, G.F.C. and Saravanamuttoo, H.I.H. “Gas Turbine Theory”,

Longman, 1989.

2. Oates, G.C., “Aero thermodynamics of Aircraft Engine Components”, AIAA

Education Series, New York, 1985.

3. “Rolls Royce Jet Engine” – Third Edition – 1983.

4. Mathur, M.L. and Sharma, R.P., “Gas Turbine, Jet and Rocket Propulsion”,

Standard Publishers & Distributors, Delhi, 1999.