How does the turbofan engine work?
How does a turbofan engine work? The incoming air is captured by the engine inlet. Some of the incoming air passes through the fan and continues on into the core compressor and then the burner, where it is mixed with fuel and combustion occurs. This means that a turbofan is very fuel efficient.
What are the four main stages of a turbofan engine?
There are four main stages in a turbofan engine; Intake; Compression; Combustion; and Exhaust. Each of these four stages work together to ultimate produce thrust. Each of these four stages work together to ultimate produce thrust. The intake stage of the turbofan engine feeds the compressor of the engine with cold air.
How does air flow through a turbofan engine?
The fan shaft passes through the core shaft for mechanical reasons. The hot exhaust passes through the core and fan turbines and then out the nozzle, as in a basic turbojet. The rest of the incoming air (colored blue) passes through the fan and bypasses, or goes around the engine, just like the air through a propeller.
What drives the fan in a turbofan engine?
A turbofan engine, sometimes referred to as a fanjet or bypass engine, is a jet engine variant which produces thrust using a combination of jet core efflux and bypass air which has been accelerated by a ducted fan that is driven by the jet core. This is necessary as the low pressure turbine also powers the fan.
How does a turbofan engine start?
The passing air spins the turbines, which then drive a shaft connected to the fan and compressor blades, spinning them. So to start a turbofan engine, you need to spin the compressor fast enough to start pushing compressed air into the diffuser and combustion chamber.
How does a high bypass turbofan work?
The compressor absorbs all the mechanical power produced by the turbine. In a bypass design extra turbines drive a ducted fan that accelerates air rearward from the front of the engine. In a high-bypass design, the ducted fan and nozzle produce most of the thrust.
How do turbofan engines start?
What is the difference between turboprop and turboshaft?
The principal difference between the two is that the turboprop version must be designed to support the loads of the attached propeller whereas a turboshaft engine need not be as robust as it normally drives a transmission which is structurally supported by the vehicle and not by the engine itself.
How does a turbofan engine produce thrust?
Jet engines, which are also called gas turbines, work by sucking air into the front of the engine using a fan. From there, the engine compresses the air, mixes fuel with it, ignites the fuel/air mixture, and shoots it out the back of the engine, creating thrust.
What are the stages of operation of a two spool engine?
A two-spool engine has two concentric shafts that rotate at different speeds: one connects the high-pressure turbine stages to the high-pressure compressor, and the other connects the low-pressure turbine stages to the low-pressure compressor and fan.
What does starting an engine initially require?
To make an engine start it must be turned at some speed, so that it sucks fuel and air into the cylinders , and compresses it. The powerful electric starter motor does the turning. The starter needs a heavy electric current , which it draws through thick wires from the battery .
Why do you start engine 2 first?
Engine number 2 is started first because it’s on the opposite side of the air bridge. When starting with external air or power it is normal to start Engine number 1 because it is further away from the carts.