What type of flow do the compressing sections of the PT6A-67P engine utilize?

The PT6A-67P engine employs axial flow in its compressing sections. Axial flow compressors are designed such that the airflow moves parallel to the axis of rotation of the rotor blades. This design is characterized by a series of rotating and stationary blades that compress the air as it passes through the stages of the compressor. The axial flow configuration allows for a more efficient compression process, providing a high pressure ratio and is advantageous for the consistent performance needed in turbine engines like the PT6A-67P.

In contrast, centrifugal flow compressors, which are often seen in different types of applications, use a radial inflow design where the air is drawn in at the center and thrown outward due to centrifugal force. These types of compressors are not utilized in the PT6A-67P engine. Therefore, understanding this fundamental difference helps reinforce why axial flow is the correct choice for the PT6A-67P engine.