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air breathing propulsion full report - ktbinu - 10-04-2017 [attachment=2109] AIR BREATHING PROPULSION In contrast to a rocket engine which, in addition to the fuel, carries along an oxidizer, an air-breathing propulsion system uses atmospheric air to oxidize the liquid fuel. Air- breathing propulsion systems include the jet engine, the ramjet and the scramjet. The field of air-breathing propulsion involves various disciplines in science and engineering such as fluid dynamics, turbo machinery aerodynamics, thermodynamics, and materials and structures. Propulsive device generates the net thrust to overcome inertia and gains speed Air breathing propulsive device uses oxygen in air to burn fuel and to generate thrust limited to dense atmosphere up to a height of about 100 km only jet propulsion presented in this seminars Turbojet Engines with rotating machinery Used by most civil and military aircrafts operating at subsonic speeds ( Mach <1 ) General Electric , Pratt & Whitney , Rolls Royce Ramjet Engines without rotating machinery Used for supersonic missiles up to Mach 5 Soviet SA-6 ,British Sea Dart , French Snecma M-88 Scramjet Engines devoid of rotating machinery Will be used for hypersonic missiles above Mach 5 Nasa X-43 , British HOTOL , German Sanger FUELS USED Gaseous Fuel Ramjet * eg. hydrogen Liquid Fuel Ramjet * kerosene , synthetic hydrocarbon fuel eg. US made RJ1, RJ4 ; French CSD07T , CSD15T Solid Fuel Ramjet * polymers loaded with metal particles like Mg ,Al or B eg. Polyether , polyester , polyurethane ADVANTAGES Able to attain high speeds up to mach 5 No moving parts so less wear & tear and minimum losses Reduced weight and smaller engine Lighter and simpler than turbojet Higher temperatures can be employed DISADVANTAGES Bad performance at lower speeds Needs booster to accelerate it to a speed where ramjet begins to produce thrust Higher fuel consumption Maximum operating altitude is limited High temperature material required THE PROMISED FUTURE Reusable Launch Vehicle will replace the space shuttle Space tourism a big industry Hypersonic passenger airliner Airplane which can take a passenger to anywhere on globe within 2 hours Space flight made cheaper and more common It could take the present cost of launching a space shuttle from $ 10 000 a pound to $ 100 a pound High speed fighter jets Long range Hypersonic missiles will come into origin air breathing propulsion full report - nitin1978 - 10-04-2017 [attachment=6153] TECHNICAL ADVANCES IN AIR BREATHING PROPULSION AIR BREATHING PROPULSION Propulsive device generates the net thrust to overcome inertia and gains speed Air breathing propulsive device uses oxygen in air to burn fuel and to generate thrust limited to dense atmosphere up to a height of about 100 km only jet propulsion presented in this seminars Turbojet Engines with rotating machinery Used by most civil and military aircrafts operating at subsonic speeds ( Mach <1 ) General Electric , Pratt & Whitney , Rolls Royce Ramjet Engines without rotating machinery Used for supersonic missiles up to Mach 5 Soviet SA-6 ,British Sea Dart , French Snecma M-88 Scramjet Engines devoid of rotating machinery Will be used for hypersonic missiles above Mach 5 Nasa X-43 , British HOTOL , German Sanger TURBOJET Air sucked in through the inlet diffuser Compressed and used to burn the fuel in the combustor Combustion products used to drive the turbine Exhaust through the nozzle to generate jet propulsion |