There is an air compressor in front of the engine. Modern compressors are divided into 7-9 stages, and the circumference of the compressor rotor is covered with blades. After the engine is started, the compressor rotates to suck in external air. After the outside air enters the duct, the compressor presses the gas to the rear step by step, and the concentration of the gas is getting stronger and stronger, and the pressure is getting bigger and bigger. When the gas passes through the last stage, its pressure will increase many times.
And then enters the combustion chamber. In the combustion chamber, electricity is injected to strike a fire, and oil is injected to burn. Because the gas contains oxygen, the gas burns and expands and ejects backward. Behind the combustion chamber is a turbine, and the turbine shaft is equipped with a turbine disk. The circumference of the turbine disk is covered with blades. The turbine is divided into 7- 13 stages.
By rotating the turbine, the gas is pushed back step by step, and through the turbine at the rear of the engine, the gas is compressed step by step, and the pressure is increased by hundreds of times. Finally, it is sprayed out through the tail nozzle. Produce a reaction force and make the plane fly forward.
Extended data:
Advantages: Propeller aircraft rely on the force generated when the propeller rotates to make the aircraft fly forward. But when the propeller speed and the flight speed of the plane reach a certain level, it is impossible to make the plane faster by accelerating the propeller speed.
Disadvantages: Low-altitude and low-speed performance is worse than propeller, and the most fatal thing is engine. Engine is the most fundamental performance of jet aircraft, and it depends heavily on the engine at high altitude and high speed. Once the engine fails, it loses power, and the plane itself is much heavier than the propeller plane, and its gliding performance is poor. It's time to test the pilot, or he will die.
Jet fighters, especially fighters, have become more difficult in air combat, because the best firing time has become only in an instant. Although there are guided missiles, guided missiles will be disturbed, and machine gun strikes are also very important.
Baidu encyclopedia -Jet