Aircraft Propulsion-I

• Introduction to IC Engines Classification and basic terminology and applications of IC engines. Air standard cycles: Otto cycle, Diesel cycle, Dual cycle, Sterling cycle, Ericsson cycles, Comparison of Otto, Diesel and Dual cycles, factors affecting the fuel air cycle, Actual cycle.
• Fuels Fuels for SI and CI engine , Important qualities of SI and CI engine fuels, Rating of SI engine and CI engine fuels, Dopes, Additives, Gaseous fuels, LPG, CNG, Biogas, Producer gas, Alternative fuels for IC engines. Fuels for Jet engine, important qualities of Jet engine Rating of Jet engine fuels.

CI&SI Engines Working of two stroke and four stroke CI &SI engines, Auto ignition of end charge, Flame speed of CI & SI Engines, Ignition delay, abnormal combustion and its control for CI & SI engines, Knock and detonation, Pre-ignition and post-ignition. Pressure versus specific volume (p-v) and pressure versus time diagrams for normal combustion, detonation in CI & SI Engines, Effect of engine operating variables on knock, knock rating of CI & SI engines, Valve timing diagram of CI & SI engines, Antiknock agents.

• Combustion chamber design Combustion chamber requirements for SI and CI engines, types of carburetors &fuel injection systems, requirements of fuel injection & carburetors in engines, Injection timings & Fuel pumps, Ignition timing and spark plug in SI engine. Exhaust emissions from CI & SI engine and its control, scavenging in 2 stroke CI & SI engines.
• Ignition System Ignition timing and performance, Effect of ignition timing on output. Factors effecting spark advance, Ignition timing and cylinder temperature, Ignition process in CI engine, Location of spark plug in SI engine. Battery ignition system, Magneto ignition aircraft engine plugs. Altitude effects on ignition apparatus.

• Cooling and Lubrication Systems Different types of cooling systems, Radiators and cooling fans, Engine friction. Various types of lubrication systems, Principles of Lubrication, Type of lubricants, Lubrication oils, Crank case ventilation, Supercharger & turbochargers and their applications, advantages & disadvantages.
• Propellers Various types of propeller, parameters of propeller & application of propellers in SI engine, thrust & efficiency of propeller.

Introduction to Rocket Propulsion Classification of rockets motors, Principles of chemical, electrical and nuclear rockets, General characteristics of solid and liquid propellant rockets, Total impulse, specific impulse and impulse to weight ratio, Thrust and thrust coefficient, Exhaust velocity and propulsive efficiency of rocket motors. Mass ratio, combustion efficiency and internal efficiency, Different solid & liquid propellants, Propellants burning rate, Electro thermal, electro static and electromagnetic propulsion systems.