What happens to the velocity and pressure of air as it flows through a dynamic compressor?

In a dynamic compressor, the fundamental principle at play is the conversion of kinetic energy into pressure energy. As air enters the compressor, it is accelerated by the rotating components, resulting in an increase in velocity. This increase in velocity occurs because the dynamic compressor relies on rotational motion, typically generated by a centrifugal force, to move the air through the system.

As the air leaves the compressor, the kinetic energy associated with its higher velocity is converted into a rise in pressure. This is based on Bernoulli's principle, which states that as the speed of a fluid increases, its pressure decreases; however, in the context of a dynamic compressor, the design allows for the conversion of that kinetic energy to pressure through controlled flow dynamics.

Thus, the combination of increased velocity and subsequent increase in pressure defines the operation of a dynamic compressor. Therefore, the correct answer highlights that as air flows through the dynamic compressor, both the velocity increases and the pressure also increases, reflecting the core functionality of these devices to compress air effectively.