航空发动机英文版

1、The aero-enginesPiston-enginesa remodeled four stroke piston engine + 2 propellersl World war 2l Economical、simple structure、light weightl Used in small planes and agricultural airplanesl Low rotational speed and power Gas turbine engine 3 main parts:Gas compressorCombustion chamberTurbine Use the h

2、eat produced by the gass combustion to work.Turbojet engineThe gas got a high temperature and pressure after burning and spout from the nozzle ,pushing the transportation to move Drive the air compressor at the same time国产国产“枭龙枭龙”朝鲜战争空中两大对手MIG-15与F-86 Used in Early fighter aircraft Easy to reach a h

3、igh speed and simple structureHigher thrust = higher temperature + higher pressure (pressure ratio) =higher speed of exhaust =waste of energy =higher fuel consumption Turbofan engineInternal bypass 内函道 external bypass 外函道bypass ratio 函道比The gas drives both the air compressor and the fan. And provide

4、 the thrustIntake more airThe fan gets a part of the energy from gas, so the gas can be more pressed ,but with a low temperature of the exhaust. Then the efficiency would be increased.Low fuel consumption and long aircraft range(航程) 波音747Used in modern fighter and transport planeTwo rotors双转子Higher

5、compress ratioturboprop engineA large bypass ratioThe gass energy is mainly used to drive the propeller, and the prop pulls the plane to move. Only a little part of the energy is taken out by the exhaustThe thrust is highFor the property of the prop, the speed cannot be very highWidely used in transport planesTurbo-shaft engineAlmost the same with the turboprop engine except that all the energy is used to drive the shaft Used in the h