Eaton Char-Lynn Motor , Do You Know The Turbofan Engine?
The Eaton Char-lynn Motor states that a turbofan engine is a gas turbine engine that combines gas from a nozzle and exhaust air from a fan to produce a reaction thrust. It consists of a fan, a press, a combustion chamber, a high pressure turbine, and an exhaust system. It is developed on the basis of turbojet engines, which have the disadvantages of high fuel consumption, low efficiency and short flight range at low speeds, increasing the flight cost of aircraft, especially civil transport aircraft. Engine efficiency includes thermal efficiency and propulsion efficiency. Increasing the thermal efficiency requires increasing the temperature of the gas before the turbine and the pressure ratio of the compressor. However, if the flight speed of the aircraft is constant, increasing the temperature before the turbine will increase the exhaust speed of the jet engine, resulting in kinetic energy lost in the air. Increase, the efficiency of promotion is reduced. This contradiction makes it difficult to increase the overall efficiency of the turbojet engine.
Turbofan engines add several stages of turbines that drive one or more rows of fans. The airflow behind the fan is divided into two parts, one part enters the compressor (intension channel), and the other part is discharged into the air without direct combustion (outer duct). Since a part of the gas energy is used to drive the front end fan, the exhaust speed is lowered and the propulsion efficiency is improved. The ratio of the air flow through the outer culvert and the connotation is called the bypass ratio. The bypass ratio has a great influence on the engine performance, the bypass ratio is large, and the fuel consumption rate is low, but the engine has a large windward area; the ducted ratio is small, the windward area is small, but the fuel consumption rate is large. At present, turbofan engines for aviation mainly have non-energized and afterburner (with afterburner). The former is mainly used for high subsonic transport aircraft, and the latter is mainly used for fighter aircraft.
https://www.xjetl.com
