Gas turbine engine, Turbojet, turbofan, turboprop schematic, identification of components flow properties along gas path, Definition of Engine Performance parameters specific thrust and specific fuel consumption, installed and uninstalled performance, Importance of by-pass ratio and afterburning, concept of multi spooling, importance of bleed and power off-take, engine systems and accessories.
Component performance, atmospheric model, correlations for variation of gas properties, inlet and diffuser pressure recovery, compressor and turbine isentropic and polytrophic efficiencies, Burner efficiency, pressure loss and pattern factor. Exit nozzle loss, propeller performance parameters, variable and constant pitch propellers, component performance with variable gas properties.
Parametric cycle analysis of real engine, turbojet, turbo jet with after burner, turbofan with separate exhaust streams, turbofan with after burning separate exhaust streams, turbofan with after burning mixed exhaust streams, turbo prop engine.
Engine operating line on compressor characteristics, Equilibrium running of gas generator, matching procedure for twin spool engines, behaviour of twin spool engines, Method of displacing equilibrium running line, matching procedure for turbofan engine, performance deterioration.
Aero engine evaluation, engine test bed types, schematic layout of test beds, instrumentation on test beds, engine and component performance from gas path data, engine health monitoring parameters, sensors, analysis of vibration and blade tip gap signals, high temperature sensors, oil debris monitoring, engine trend analysis for engine diagnostics and prognostics.
Noise characterization, Measurement of noise, sources of noise generation in aero engine components, noise propagation due to propellers, comparative noise characteristics for turbojet, turbofan, turbo shaft and turbo prop, active and passive methods for noise reduction, International standards for aero engine noise
Aircraft engine integration, configuration of engine locations in aircrafts, types of nacelles and pylon. Engine mounts, basic loads on engine mounts. Nacelle-pylon-wing integration, Types of thrust reverser and its mechanism. Drag due to nacelle, engine installed performance
Aero engine control, FADEC architecture, Digital electronic control unit for aero engine, Gas generator control, engine limit protection, engine automatic and manual starting, power management, engine data for cockpit indication, engine condition parameters display in the cockpit, thrust reverser control and feedback, fuel control and computation, fuel recirculation control, cooling of FADEC, management of engine subsystems like lubrication, on board power, fuel scavenge, starting system, Engine gas path data in FADEC, Engine health management from flight data recorder.
Course outcomes:
At the end of the course the student will be able to:
1. Apply the basics of aero engine performance and evaluation, control and simulation.
2. Distinguish different performance parameters and characteristics.
3. Evaluate aero-engine component performance and engine integration.
Question paper pattern:
The SEE question paper will be set for 100 marks and the marks scored will be proportionately reduced to 60.
Textbook/ Textbooks
1 Elements of Gas Turbine Propulsion Jack D. Mattingly Tata McGraw-Hill Publishing Company Limited, New Delhi, 1996
2 Aerothermodynamics of Gas Turbine and Rocket Propulsion Gordon C. Oates AIAA Education Series 1 st edition &1984
Reference Books
1 Aircraft Engine Design Jack. D. Mattingly, William H. Heiser, David.T.Pratt AIAA Education Series 3 rd edition & 2017
2 Jet Propulsion Nicholas Cumpsty Cambridge University Press 1997
3 Aircraft Propulsion Saeed Farokhi John Wiley & Sons, Inc 2 nd edition 2014
4 Aircraft Propulsion and Gas Turbine Engines Ahmed F. E1-Sayed CRC Press, Taylor and Francis Group 2 nd edition &2017
5 Gas Turbine Performance Philip P. Walsh and Paul Fletcher Blackwell Science Ltd, Blackwell Publishing company 1998
6 Systems of Commercial Turbo Fan Engines-An Introduction to System Functions, Andreas Linke-Diesinger Springer Publications 2008