DIFFUSER

The diffuser is the divergent section of the engine after the compressor and before the combustion chamber. The diffuser increases the cross-section of the duct, for a constant mass flow, the velocity drops. This increases the static pressure of the air. Additionally, it decelerates the 350 m/s flow to a 50 m/s flow before fuel injection. This deceleration is crucial for optimal fuel burning conditions. It prepares the air for entry into the flame burning area of the combustion section at a lower velocity so that the flame of combustion can burn continuously. If the air passed through the flame area at a high velocity, it could extinguish the flame.