Engine RADIATOR FAN 612600060038

The function of the fan at the front of the engine is to dissipate heat from the engine and the coolant, ensuring that the engine does not overheat and malfunction. In a high-temperature working environment, the automotive engine must be adequately cooled to maintain its operation at an appropriate temperature, which is necessary to meet the requirements for good engine performance, durability, and exhaust emissions. The engine cooling system plays a crucial role in this, including components such as the cooling fan, water tank, and thermostat.

Based on important performance indicators such as total boost ratio, thrust-to-weight ratio, turbine inlet gas temperature, fuel consumption rate, and bypass ratio, the performance characteristics of various generations of turbojet, turbofan, and military turbofan engines are pointed out.

The comparison of turbojet engines, turbofan engines and military turbofan engines is as follows. By comparing the performance indicators of typical third-generation engines, as shown in the table below: Through analysis and comparison, with the advancement of technology, the new generation of turbojet engines have higher compression ratios, thrust-to-weight ratios, and a significant increase in turbine gas temperature. Especially for the third-generation engines, the overall performance has been greatly improved.

The bypass ratio of civil turbofan engines has been further increased, and the turbine gas temperature has also risen. Without affecting the overall performance, a series of measures have been adopted to reduce the fuel consumption rate.

Main features: The AL-31F engine is the power unit of the Su-27. Its main components include a low-pressure compressor, an intermediate casing, a high-pressure compressor, a ring-shaped combustion chamber, a dual-rotor turbine, a jet-assisted thrust combustion chamber, a fully adjustable Raviol nozzle, and accessory transmission casing, etc. Among them, the compressor has 13 stages, with 4 stages for the low-pressure compressor and 9 stages for the high-pressure compressor; the turbine is a dual-rotor flow-reactive type, with 1 stage for the high-pressure turbine and 1 stage for the low-pressure turbine. The high-pressure rotor is rigidly connected and supported by...