The role of an aero engine, compressor, turbine

I understand that you are talking about the impeller, because the compressor is in front of the combustion chamber and the turbine is in the back of the combustion chamber.

Compressor: Compresses the atmosphere to a specified index through about 9-11 impellers, and then enters the combustion chamber;

Turbine: The turbine is a component that does work under the impetus of gas, converts the kinetic energy of the air flow into shaft horsepower, and its working environment is extremely harsh, withstanding high temperatures of about 1400 yuan

The high-temperature and high-pressure gas flowing from the combustion chamber flows through a turbine mounted on the same shaft as the compressor. In a turbojet engine, the work done by the expansion of the air flow in the turbine is exactly equal to the work consumed by the compressor to compress the air and the work required by the transmission accessories to overcome the friction. After combustion, the gas energy before the turbine is greatly increased, so the expansion ratio in the turbine is much smaller than the compression ratio in the compressor, and the pressure and temperature at the turbine outlet are much higher than the compressor inlet, and the thrust of the engine is the energy of this part of the gas.

It is a compressor effect.

Is it a professional?It should be understood.

A ramjet air turbine (RAT) is when an aircraft is shut down and the auxiliary power system (APU) fails completelyDrive the emergency hydraulic pumpof turbines (propellers). Emergency hydraulic pumps are used to keep the aircraft's hydraulic transmission system running in an emergency, as well as to ensure itEmergency generators powered by hydraulic drivetrainsof operation.

To put it simply, the ramjet air turbine drives the hydraulic pump, and the hydraulic pump drives the hydraulic system and generator that operate the aircraft.

Note: Because the power of the emergency generator is small, it can only ensure the power supply of the lighting and control system in the cockpit of the aircraft, but not the power supply of the lighting and other equipment in the cabin.

Hello, dear and dear, the turbocharged engine uses the principle of aerodynamics to compress the air intake through the high-speed rotating turbine to increase the pressure of the inlet and sell the air into the cluster, thereby increasing the air intake and oxygen content of the engine, and then improving the power performance of the engine. Specifically, an aircraft turbocharged engine consists of two parts: a turbine and a compressor.

The turbine is propelled by a high-temperature, high-pressure gas that drives the compressor to compress air while rotating at high speed. The compressed air is then injected into the combustion chamber through the fuel injector and ignited, and the output of high temperature and high pressure air flow pushes the turbine to rotate, so as to achieve turbocharging. The advantage of turbocharged engines is that they can improve the high-altitude performance of the aircraft, because the lean air pressure at high altitude is very low, and if a normal engine is used, the thrust output of the engine will be greatly reduced at high altitude, and the aircraft cannot be maintained in the air.

Through turbocharging, it can maintain a more stable thrust output at high altitude, and can also improve the combustion efficiency of Zhenglao oil and reduce fuel consumption.

Aircraft turbocharged engine is a common aero engine that is mainly used to increase flight altitude and flight speed. The working principle of hail can be simply summarized as the following three steps:1

Compressor: Air enters the compressor through the air intake, is compressed into a high-pressure gas, and then burns the fuel through the combustion chamber, releasing energy. 2.

Turbine: The high-temperature and high-pressure gas flows through the turbine, and the turbine rotates accordingly, driving the coaxial compressor to rotate, forming a continuous compression and combustion process, propelling the aircraft forward. 3.

Supercharger: After the gas flows through the turbine, it enters the backshift pressur, and the supercharger increases the gas pressure, so that the engine can work normally at high altitude to ensure the cruising altitude and speed of the aircraft. It should be noted that turbocharged engines are powered by high-pressure gases, which require careful design and manufacturing of the engine to ensure its safety and reliability.

At the same time, regular maintenance and inspection are also required during use to ensure its normal operation and prolong its service life.

Hello dear. Advantages of gas turbine aero engines; First, the development cycle is short and the investment is low. Because it makes full use of mature aero engine technology, it is modified and developed on the basis of the existing unit, and the economic cost and time cost are low.

Second, high efficiency and light weight. The pre-turbine gas temperature and booster ratio of the aero engine are very high, so the modified unit can have higher combustion efficiency. The volume and weight of the aero engine are much smaller than that of the industrial gas turbine, which also makes the aero-modified gas turbine more compact and can be used in multiple occasions more flexibly.

3. Easy maintenance and high utilization rate. Aeronautical gas turbines are generally overhauled by replacing the gas generator, which avoids the trouble of industrial gas turbines needing on-site dismantling and maintenance. It takes less than 10 hours to replace the gas generator, which greatly improves the utilization rate of the unit compared to the maintenance cycle of industrial gas turbines of about a month.

The principle of the turbine engine (gas turbine) is the same as that of the Chinese marquee, there is an impeller above the marquee, just like a windmill, when the lamp is lit, the air in the lamp is heated, and the hot air rises to push the impeller on the lamp to rotate, driving the pony below to rotate together.

The gas turbine relies on the high-pressure and high-speed gas generated by the combustion chamber to propel the gas impeller to rotate.

Air enters the gas turbine from the air inlet, and a high-speed rotating compressor compresses the air into high-pressure air. The fuel is burned in the combustion chamber to produce high-temperature and high-pressure air; High temperature and high pressure air expansion pushes the turbine to rotate to do work;

Air is the working medium, the oxygen in the air is the accelerant, and the combustion of fuel makes the air expand to do work, that is, the chemical energy of the fuel is converted into mechanical energy.

Turbojet is the basic type and is used in jet fighters.

For example, China's J-8 fighter uses turbojet engines.

The characteristics of this engine are suitable for high altitude and high speed, and the disadvantage is that at low altitude and low speed, the efficiency is not high, that is to say, it is more fuel-intensive, and the thrust is not large enough.

The turbofan is an enhanced type, adding an external duct on the basis of the turbojet, so that the wind blown out by the fan is blown out directly through the outer duct to increase the thrust, and through some technical means, the wind of the outer duct can be blown out of the front to form a reverse thrust, which is generally used for large aircraft such as passenger aircraft.

Now the new fighters also use turbofan engines, but they are improved turbofan engines with small bypass ratios, such as F22 and China's J-20 and so on.

The advantage of this engine is that compared with the turbojet engine, the thrust is larger, the efficiency is higher, and the larger the bypass ratio, the more obvious this advantage, the disadvantage is that it cannot be used in high-speed conditions (referring to supersound).

The small bypass ratio turbofan engine used by the fighter should belong to the compromise of the turbofan engine and the turbojet engine, of course, the small bypass ratio turbofan still belongs to the turbofan engine, this kind of engine can be applied to supersonic conditions, and even supersonic cruise can be realized, finding a better balance in the contradiction between speed and fuel economy.

However, at more than twice the speed of sound, the turbojet engine is still more advantageous.

Turbojet is another type of enhancement that uses the power output of a turbojet engine to drive a propeller many times larger than a fan to increase thrust, which can also be understood as using a larger fan than a turbofan engine.

The advantage of the propeller is that the thrust is greater and the efficiency is higher, but the disadvantage is that it is very noisy and the adaptation speed is slower, so it is mostly used in transport aircraft and other models that do not require high noise, and the speed of the turbo aircraft is slightly slower.

The turboshaft is a modification, which outputs most of the power of the turbojet through the gear or worm gear transmission to an output shaft at an angle of 90 degrees with the engine, which is equivalent to a turboshaft engine with many times larger slurry.