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Most turbofan engines have parts running at more than one speed. The inner most compressor stages and the first turbine stages usually turn faster than the outer stages.
The more popular engines seen on airliners use three stages, and three different speeds at any given time.
Watch a modern airliner engine during engine start and you can hear the inner stages begin to spin up before you will see the outer fan stage begin to rotate.
It depends on the engine, but the largest fan stage which is seen in the intake will be less than 10k rpm, often less than 5k.
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How does an airplane accelerate?
An aircraft uses a turbofan engine to reach takeoff and cruising speed. Look up TURBOFAN on Google for more info!
Is a turbojet engine the same as a jet engine?
Nothing, the are the same thing. Jet is just the shorter way of saying it. However, there is a difference between a turbofan and turbojet. A turbofan has a large fan at the front of the engine where as a turbojet doesn't have this fan. Turbofans are mainly used in modern commercial airliners where as turbojets were used in older commercial airliners and are now used on fighter jets.
Which engine is more efficient in jet engines. Turbo jet or the Turbo fan?
The term "Turbofan" is actually quite broad, but can be broken down into two categories…high and low bypass. The question you are really trying to ask is which engine type (high bypass or low bypass) turbofan engine is more efficient? High bypass engines are used on most commercial airplanes (except the Concord) and these engines are favorable because they have a balance of high thrust, and efficiency. Aircraft that need supersonic capabilities (like the Concord) use a low bypass turbofan engine. These engines produce the thrust required to propel a plane beyond the speed of sound, but at the cost of efficiency. They burn a lot of fuel in doing so. So one could draw the conclusion that high bypass turbofan engines are more efficient, but this would not be true. In order to propel a plane beyond the speed of sound the low bypass turbofan engine is the most efficient way of doing so. On the flipside, the high bypass turbofan engine is most efficient for practical air travel. Both engine types are very different, but each are specialized to achieve different goals.
Who invented the turbofan engine?
Gerhard Neumann
What type of engine is in the Boeing 737?
turbofan
How fast does the turbofan go?
A turbofan engine is the most modern variation of the basic gas turbine engine. As with other gas turbines, there is a core engine, whose parts and operation are discussed on a separate page. In the turbofan engine, the core engine is surrounded by a fan in the front and an additional turbine at the rear. The fan and fan turbine are composed of many blades, like the core compressor and core turbine, and are connected to an additional shaft. All of this additional turbomachinery is colored green on the schematic. As with the core compressor and turbine, some of the fan blades turn with the shaft and some blades remain stationary. The fan shaft passes through the core shaft for mechanical reasons. This type of arrangement is called a two spool engine (one "spool" for the fan, one "spool" for the core.) Some advanced engines have additional spools for even higher efficiency.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. 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 passes through the fan and bypasses, or goes around the engine, just like the air through a propeller. The air that goes through the fan has a velocity that is slightly increased from free stream. So a turbofan gets some of its thrust from the core and some of its thrust from the fan. The ratio of the air that goes around the engine to the air that goes through the core is called the bypass ratio.Because the fuel flow rate for the core is changed only a small amount by the addition of the fan, a turbofan generates more thrust for nearly the same amount of fuel used by the core. This means that a turbofan is very fuel efficient. In fact, high bypass ratio turbofans are nearly as fuel efficient as turboprops. Because the fan is enclosed by the inlet and is composed of many blades, it can operate efficiently at higher speeds than a simple propeller. That is why turbofans are found on high speed transports and propellers are used on low speed transports. Low bypass ratio turbofans are still more fuel efficient than basic turbojets. Many modern fighter planes actually use low bypass ratio turbofans equipped with afterburners. They can then cruise efficiently but still have high thrust when dogfighting. Even though the fighter plane can fly much faster than the speed of sound, the air going into the engine must travel less than the speed of sound for high efficiency. Therefore, the airplane inlet slows the air down from supersonic speeds.
Could you put a gas turbine engine in a car?
Look up the Bloodhound SSC, they've put the Eurojet EJ200 turbofan engine from the Eurofighter Typhoon into it to break the land speed record.
Which type of engine is used by F-16?
Pratt & Whitney F100 turbofan engine
What type of starting system in high bypass turbofan engine?
High Bypass turbofan engines use pneumatics (air) for starting the engines.
At what temps do the low speed and high speed fans come on on your Focus?
The low-speed fan will come on when your engine temperature reaches 180 degrees. The high speed fan will come on. When the engine temperature reaches 200 degrees.
What is airplane engine called?
Piston, turbojet, turbofan, turboprop to name a few.
What has the author Philip R Gliebe written?
Philip R. Gliebe has written: 'UHB engine fan broadband noise reduction study' -- subject(s): Fan blades, Noise reduction, Blade slap noise, Engine tests, Broadband, Flight simulators, Turbine wheels, Turbofan engines, Noise generators, Engine noise
