The air inlet is smaller than the air inlet, and the air inlet is enlarged. After the air enters, the speed decreases and the pressure and temperature increase, thus achieving the purpose of stamping compression and pressure recovery. This can minimize the loss of airflow. Then it passes through the inlet rectifying cone, so that the airflow is evenly sent to the compressor to ensure the normal operation of the compressor. These two points are also the basic functions of the inlet.
One parameter is to measure the total pressure recovery coefficient of the inlet.
The tail nozzle of turbojet engine accelerates the expansion of gas and ejects it at a certain speed to obtain thrust.