ABSTRACT
Turbofan engines were first termed by Rolls-Royce as bypass turbojet. Boeing Company sometimes identifies them as fanjets [1]. Turbofan engines are the most reliable engines ever developed. Fundamentally, turbofan engines are fuel-efficient and quiet turbine engines. They feature continuous combustion and smooth rotation, unlike the internal combustion engine of an automotive. Similar to the turbojet engines, the gas generator in turbofan engines has three sections:
• Fan unit and compressor section • Combustion chamber • Turbine section
The compressors pressurize air and feed it aft. Most of the air goes around the engine core through a nozzle-shaped chamber. The rest goes through the engine core where it mixes with fuel and ignites. The hot expanding combustion efflux passes through the turbine section, spinning the turbine as it exits the engine.
