It is often assumed that the axial velocity component remains constant through the stage.

Since we assume that there is no change in axial velocity across the disc, .

In a multi-stage compressor, at the high pressure stages, axial velocity is very small.

Also, for constant axial velocity yields a useful relation:

The velocity profile should be referred to as the axial velocity profile.

The left side of the betz curve shows a maximum efficiency of 50% when the exiting air (V2) has no axial velocity.

For an axial flow driven by a pressure gradient , the axial velocity is scaled with .

The axial velocity of the resonator's charge-coupled electromagnetic field is established by the coil pitch and electrical charge propagation speed through the circuit.

Diagonal or mixed-flow compressors are similar to centrifugal compressors, but have a radial and axial velocity component at the exit from the rotor.

In swirl injector, the spray cone angle is controlled by the ratio of the circumferential velocity to the axial velocity and is generally wide compared with nonswirl injectors.

The rate of change of axial momentum can be expressed as the difference between the initial and final axial velocities of the fluid, multiplied by the mass flow rate:

The speed seen by the rotor blade is dependent on three things: the axial velocity of the fluid, ; the tangential velocity of the fluid due to the acceleration round an airfoil, ; and the rotor motion itself, .

Francis turbine is a mixed hydraulic turbine (the inlet velocity has Radial and Tangential Components) while the Kaplan turbine is a Axial hydraulic turbine(the inlet velocity has only Axial Velocity Component).