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DJJ 6182 Engineering Plant Technology
Transcript of DJJ 6182 Engineering Plant Technology
Gas turbines are used for aircraft propulsion system because they are light and compact and have a very high power to weight ratio.
AIRCRAFT GAS TURBINE
Aircraft gas turbines operates on an open cycle called “jet propulsion cycle”, which can be of turbojet engine, turbofan engine or turboprop engine.
AIRCRAFT PROPULSION SYSTEM
DJJ 6182 ENGINEERING PLANT TECHNOLOGY
LOGESWARAN S/O GOVINDARAJAN 08DKM14F1104
NUR FITRI RAYHAN BINTI SHAHIDAN 08DKM14F1096
MUHAMMAD MUSLEH BIN ANUAR 08DKM14F1100
NOR SUHAILA BINTI ABDUL MAJEED 08DKM14F1108
MUHAMMAD AZRUL AZANI BIN MOHD AFANDI 08DKM14F1112
AIRCRAFT PROPULSION SYSTEM
Aircraft is any craft that flies through the air, whether it be an airplane, helicopter, missile, glider, balloon, or any other vehicle that uses the air to generate lift for flight.
Propulsion means the action of driving or pushing forward. Jet propulsion is used in the most of the Aircrafts.
Jet propulsion is similar to the release of an inflated balloon.
THRUST VECTOR CONTROL
High velocity air first flow through diffuser where it is decelerated increasing its pressure air is then compressed in the compressor.
The high pressure high temperature combustion gases partially expand in the turbine producing enough power to drive the compressor and auxiliary equipment. Finally the gases expand in the nozzle to the ambient pressure and leave the aircraft at high velocity
The air is mixed with fuel in the combustion chamber, where the mixture is burned at constant pressure .
JET PROPULSION SYSTEM
When the work output of the gas turbine plant is used to produce high velocity jet of hot gasses and this jet is used to propel (to push or move something with a lot of force) the vehicles in which the systems are mounted, such systems are known as jet propulsion system .
Turbo jet -
The turbojet uses a series of fan-like compressor blades to bring air into the engine and compress it.
It works with working fluid(air) consists of inlet compressor , combustion chamber , turbine , nozzle.
Turbo jet gives good efficiency at higher speeds (800km/h) and high rate of climb and un interrupted power supply.
It is a combination of propeller engine and turbo jet engine.
It consists of a propeller and reduction gear box in the front to reduce the speed of rpm.
Works same as turbo jet it used by mostly military and also civil aviation.
3.Turbo fan -
It has one or more rows of compressor blades extend beyond the normal compressor blades. The result is that four times as much air is pulled into the turbofan engine as in the simple turbojet.
Most of this excess air is ducted through by passing around the power section and out the rear with the exhaust gases.
The turbofan has greater thrust for takeoff, climbing, and cruising on the same amount of fuel than the conventional turbojet engine.
It has the facility of thrust augmentation like (afterburner, bleed burner) turbofan engine has gained lot more popularity then turbo jet.
Rocket is a vehicle is used to launch astronauts(crew) or payload in to space.
It works on Newton’s third law by obtaining thrust from its rocket engine and throwing the exhaust jet backwards through a supersonic nozzle which pushes the rocket forward.
Thrust vector control is a method of manipulating the direction of thrust form its engine in order to control the altitude and angular velocity of an aircraft or rocket
It plays major important role for (VTOL),(STOL) aircrafts and also used in combat situation which enables to perform various maneuvers in military aircraft
Most aircraft currently equipped with thrust vectoring ability use turbofans with rotating nozzles or vanes in order to deflect the exhaust stream.
ENCIK. ASMIRA BIN ASHARI