Flow through the combustion chamber
1) Flow loss in the diffuser. It includes the flow resistance that the frictional resistance and the expansion angle are too large to cause the airflow to escape;
2) Flow loss as the airflow flows through the various components of the combustion chamber. Including the pressure loss of the airflow through the head device (spoiler or combustion bowl, etc.) and the pressure loss when flowing through the wall inlet hole or gap;
3) the mixing loss between the intake jet and the main flow in the flame tube;
4) additional pressure loss caused by airflow through various obstacles (support plates, baffles, nozzles, etc.) in the passage;
5) Loss of thermal resistance due to changes in airflow density when the airflow is heated.