Detailed Cycle Analysis of Turbofan Engine Essay

Detailed Cycle Analysis of Turbofan Engine - Essay Example 1. Fan – The fan is at the obverse of the engine. The process of propulsion begins at this part. The fan initiates a flow of air around the engine. The air gets separated into two streams. The larger stream, known as bypass air, is typically about 85%, while the smaller stream which refers to primary air, is about 15% of the total volume of air. The bypass air usually keeps the engine quieter, cooler and more fuel efficient. 3. Combustion chamber – After the compression process is complete the highly pressured air got forced through a combustor. Then, fuel got added and burned. This process makes the air temperature to be high. 4. Turbines – Hot air gets blasted through the blades of the turbines. The two whirling turbines rotate the shafts that steer both the fan and the compressors at the front part of the engine. This process allows modern jets to function with high fuel efficiency. 5. Exhaust nozzle – The hot air get forced via the exhaust opening at the rear part of the engine. The air gets forced to accelerate due to the thin walls of the exhaust nozzle. The acceleration of the air, combined with its weight, drives the engine forward. An explanation of how the turbofan engine works became discussed here. The inward bound air enters the engine shaft. A portion of the inward air passes through the ducted fan. It continues on into the core compressor (Diesinger 2008, p.34). This then goes to the burner. Here, air mixes with fuel and combustion occurs. For the basic turbojet, the hot exhaust gas passes through fan turbines, the core and then out through the nozzle. The surplus of the inbound air passes through the bypasses and fan. Sometimes it goes about the engine. This is just like the air via a propeller. The velocity of the air that passes via the fan is higher than the free stream. A turbofan gets a portion of its thrust from the fan and the rest from the core (Peter Galison 2000, p.25). In the analysis of the engine cycle, the bypass ratio