answersLogoWhite

0


Best Answer

The simple answer is: "Suck, Squeeze, Burn and Blow." Or, more accurately, air is taken into the inlet of a jet engine (suck) and then compressed (squeeze) by a series of rotors and stators. A fuel mixture is then injected into a chamber with the compressed air and ignited (burn). The subsequent combustion is directed aft and the resulting exhaust (blow) pushes the engine (and vehicle) forward. The exhaust gasses also turn a shaft connected to the inlet turbine which continues the compression process. It's really a lot more complicated than this, but this is the quick and dirty of how it works.

A modern jet engine is made up of several rows of spinning propeller blades called Rotors. As the airflow goes through each row, the air is accelerated and compressed. Behind the row is another set of blades that are not really turning---but attached to the out housing. These are called Stators. These help to re-direct the flow to be more efficient and prepare it to meet the next set of spinning blades. After going through several rows of Rotors, the air is compressed. This stage of the engine is called the Compressor.

The compressed gas enters a Combustion Chamber where fuel is added an a spark ignites the fuel/air mixture and this flame is self-sustaining. The hot gases want to expand and it passes through another set of Rotors and Stators that extract some energy out of the fast flowing air gases. This section of the engine is the Turbine stage because it acts like the turbines in a dam to pull energy out of flowing fluid. This engergy is used to turn the Turbine disc that is connected back to the Compressor stage, thus compressing the next amount of air entering the engine.

The gas escaping the engine has a great amount of energy and velocity and applies thrust to the engine and thus to the airplane.

Hi bypass commercial jets (Trent 900, GEnx) use outer guide vanes or OGV's to rotate and eject air before the compressor stage. The air rotates around the exhaust to reduce friction of exhaust gases increasing efficiency and reducing noise.

The steps in a jet engine are essentially the same as in a car engine: Intake, Compression, Combustion, Exhaust.

In modern jet engines, the air is pulled into the engine by a large disc of spinning blades called the fan. This is what you see if you look into the front [intake] of the engine. Behind the fan is the bypass duct [mentioned later] and the engine core.

The engine core contains more spinning components similar to the fan called 'compressors' that simply compress the air into a smaller area.

Behind the compressors is the combustion chamber, where the air is sprayed with jet fuel from a nozzle and ignited by a flame.

It then passes through one more spinning component called the turbine, which accelerates the air out the back of the engine. That turbine is connected to the compressors by a shaft running through the center of the engine and is what runs them.

The bypass duct [mentioned earlier] is simply a hollow area surrounding the engine core. Some of the air that gets taken in is routed by the fan through the bypass duct so that it totally bypasses the engine core, and mixes with the exhaust behind the engine. This makes the engine more efficient and muffles the sound of the exhaust, making the engine quieter. A better understanding of thrust

A common misconception about thrust is that the exhaust gasses expelled from the rear of the engine cause the engine and the attached aircraft to move forward. This is not true.

Although the expelled gasses do add a minimal amount of forward thrust, the majority of thrust created by the engine is from the aerodynamic forces generated by the aforementioned Rotors.We must first understand that Rotors are aerodynamic devices known as Airfoils because of their designed curvature. An Airfoil that passes through a body of air will cause a pressure differential that causes lift. The wings of an aircraft are examples of an airfoil, and as air passes around the wings, the curvature that engineers design into the wing will cause a higher pressure to act upon the underside of the wing, and a lower pressure to act upon the upper surface of the wing. As this pressure differential becomes greater, it eventually overcomes the combined forces of gravity and the mass of the aircraft, and the aircraft flies. This same principle can be used to explain why the Rotors are the primary source of forward thrust. As the rotors spin, they too will develop pressure differentials, but because they are mounted vertically like a propeller on a small plane, they will produce forward thrust, instead of creating upward lift as we are used to associating with horizontally mounted aircraft wings. NASA explanation of thrust See the the discussion page for more information.

User Avatar

Wiki User

โˆ™ 2015-10-01 21:06:52
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar
Study guides
๐Ÿ““
See all Study Guides
โœ๏ธ
Create a Study Guide

Add your answer:

Earn +20 pts
Q: How do jet engines work?
Write your answer...
Submit
Related questions

What do jet engines need to fly?

jet engines require air, compression, and combustion to make it work


How do jet ski engines work?

me i think they work very nice.


Did the b-36 jet engines use jet fuel or the same gas as the 4360 engines?

The jet engines used jet fuel, not gasoline as the 6 main engines did.


Is it posibale to make jet engines work for space flight?

no jet engines use air intakes which are not possible in large enough quantities in space


How does the Pulse jet engine work?

A pulse jet engine is one of the most simple and efficient propulsion devices ever designed. There are three types of pulse jet engines: The valved pulse jet, the valveless pulse jet, and the upright or "Jam jar jet". For complete details on pulse jet engines, go to wikipedia.org and search "Pulse Jet Engine".


How do aircraft engines work?

It depends on whether it is a piston or jet (turbine) engine.


What is a jet aircraft?

An aircraft propelled by jet engines rather than piston engines.


Why does a space craft requires a rocket engine instead of a jet engine?

because jet engines reqire air to take in in order to work, rocket engines spew matter to privide thrust


What is faster an airplane or a jet?

A jet is a type of engine on an airplane. Some airplanes have propellers - those without propellers have jet engines. Airplanes with jet engines are faster than airplanes with propellers. Often airplanes with jet engines are referred to as "jets."


Which part on England make jet engines?

Many factories in Britain make jet engines.


What is jet plane?

A jet plane is any aircraft powered by jet engines.


Are jet engines still used today?

yes they are, they are the engines you see on a 747 or even a small Private jet


Why are jet engines suitable for aircraft but not for outer space?

Jet engines use the oxygen in the air to get the fuel to burn. In space there's no oxygen, so a jet engine would simply go out. Space rockets carry both their fuel and their oxygen, which allows them to work in the vacuum of space.


How many cylinders of jet engines?

None. Jet engines don't have cylinders. While Jet engines don't have cylinders they have combustors (which can also be called combustion chambers). Due to turbulence and other problems early jet engines had multiple small combustors, most modern jet engines have only one large combustor as it is simpler to build. some jets have combustion 'cans' which are cylinders but have no moving parts within


Why do some airplanes need jet engines to fly?

It isn't a matter of why they need it! Some planes are just designed with jet engines! Jet engines take a small amount of air and push it out fast whereas props take a large amount of air and push it back slower! Some planes just have jet engines!


What is a jet engines dimensions?

It is the height, width and length of a jet engine.


Are jet engines safe?

No they're not safe. Jet engines are very dangerous and extremely powerful. They can take your whole body if you get to close. Don't get so close if the aircraft engines are on.


How many engines does a jet aircraft have?

For the most part, jet engine aircraft mostly have 2 jet engines such as the a319, 737 and private jets such as lears and gulfstreams. However, this is purely dependent on the type of aircraft it is. Some aircraft, such as the 747, a340 and a380 have 4 jet engines.


How does a pulse jet work?

Pulse jet is used to power experimental helicopters, it work by attaching the engines to the extreme ends of the rotor blades. As an aircraft propulsion system, pulse-jets have the distinct advantage over conventional turbine engines by not producing the usual reaction torque upon the fuselage.


Why are jet engines used for jets?

There is no actual answer, because a jet is called a jet because it has at least one jet engine.


How do jet planes fly?

Jet planes fly with the help of Thrust and Lift produced by the jet engines.


Where does jet engines go?

junkyard


What would jet engines be like without Chromium?

Pretty much the same. Most jet engines contain very little chromium


Is a embraer rj145 a prop or jet engines?

I think they are jet aircraft although they have turbofan engines. You can check more on thee link below


What kind of engines are in a plane?

jet engines, turbojet engines, turbo-prop engines, four-stroke piston driven engines... Can you be more specific?