Technology, Oil-Free Compressors

Principles of the Axial Compressor


Axial compressors are a type of dynamic compressor. Unlike displacement compressors, dynamic compressors work under constant pressure and are affected by changes in external conditions such as inlet temperature.

As the name suggests, these compressors have an axial flow; the air or gas passes along the compressor shaft through rows of rotating and stationary blades. The blades convert the kinetic energy to pressure, and a balancing drum is built in to offset the axial thrust.

These compressors are typically smaller and lighter than their centrifugal counterparts, yet they operate at higher speeds. Like other dynamic compressors, axial compressors are used for constant, high volume flow rates at moderate pressure, like ventilation systems. Because they have a high rotation speed, axial compressors work well when paired with gas turbines for electricity generation and aircraft propulsion.

Whether it’s a displacement or dynamic compressor, the result is always compressed air. But while all air compressors create the same end product, the principles behind different designs vary widely. Learn more about the mechanics that drive air compressors by subscribing to our weekly newsletter, and check out our range of compressors now available for purchase online.