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U5AEA18 PROPULSION -II. Mr. SYED ALAY HASHIM Assistant Professor Department of Aeronautical Engineering VEL TECH Dr. RR & Dr. SR TECHNICAL UNIVERSITY Chennai INDIA. I to V UNIT POWER POINT PRESENTATION. TURBINE VELOCITY TRIANGLE. BLADE EFFICIENCY. STAGE WISE WORK GENERATION.
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U5AEA18PROPULSION -II Mr. SYED ALAY HASHIM Assistant Professor Department of Aeronautical Engineering VEL TECH Dr. RR & Dr. SR TECHNICAL UNIVERSITY Chennai INDIA
I to V UNIT POWER POINT PRESENTATION
RAMJET A ramjet, sometimes referred to as a flying stovepipe, or an athodyd which is an abbreviation of Aero thermodynamic duct, is a form of air breathing jet engine using the engine's forward motion to compress incoming air, without a rotary compressor. Ramjets cannot produce thrust at zero airspeed, thus they cannot move an aircraft from a standstill. Ramjets therefore require assisted take off like JATO to accelerate it to a speed where it begins to produce thrust. Ramjets work most efficiently at supersonic speeds around Mach 3. This type of engine can operate up to speeds of Mach 6.
A scramjet (supersonic combustion ramjet) is a variant of a ramjet air breathing jet engine in which combustion takes place in supersonic airflow. As in ramjets, a scramjet relies on high vehicle speed to forcefully compress and decelerate the incoming air before combustion (hence ramjet), but whereas a ramjet decelerates the air to subsonic velocities before combustion, airflow in a scramjet is supersonic throughout the entire engine. This allows the scramjet to operate efficiently at extremely high speeds: theoretical projections place the top speed of a scramjet between Mach 12 (9,100 mph; 15,000 km/h) and Mach 24 (18,000 mph; 29,000 km/h)
TURBO RAMJETS RAM ROCKET
LIQUID PROPELLANT LIQUID FUELS • Hydrocarbon Fuels • Liquid Hydrogen (H2) • Hydrazine (N2H4) • Unsymmetrical Dimethyl hydrazine [(CH3)2NNH2] • Monomethylhydrazine (CH3NHNH2) LIQUID OXIDIZERS • Liquid Oxygen (02) • Hydrogen Peroxide (H202) • Nitric Acid (HNO3) • Nitrogen Tetroxide (N204)
TYPES OF ELECTRICAL ROCKET 1. Electrothermal- Propellant is heated electrically and expanded thermodynamically; i.e., the gas is accelerated to supersonic speeds through a nozzle, as in the chemical rocket. 2. Electrostatic- Acceleration is achieved by the interaction of electrostatic fields on non-neutral or charged propellant particles such as atomic ions, droplets, or colloids. 3. Electromagnetic- Acceleration is achieved by the interaction of electric and magnetic fields within a plasma. Moderately dense plasmas are hightemperature or nonequilibrium gases, electrically neutral and reasonably good conductors of electricity.
ELECTRICAL ROCKETS ION ROCKET MAGNETOPLASMA ROCKET ARC-JET ROCKET