Multiple blade rows for impeller and diffuser stages

A machine comprising:

• a centrifugal impeller stage configured to rotate about an axis of rotation, the impeller stage having three, separate rows of impeller blades, a first row of impeller blades configured to accept a fluid flow in an axial direction, accelerate the fluid flow on a vector away from the axis of rotation, and discharge the fluid flow in an outward radial direction to a second row of impeller blades, the second row of impeller blades configured to accelerate the fluid flow in the outward radial direction, and a third row of impeller blades configured to accept the fluid flow in the outward radial direction from the second row of impeller blades, first accelerate the fluid flow on a vector toward the axis of rotation in an inward radial direction, and then accelerate the fluid flow in the axial direction;
• and
• a diffuser stage about the axis of rotation, the diffuser stage having three rows of diffuser blades, a first row of diffuser blades configured to receive the fluid flow from the impeller stage in the axial direction, and then direct the fluid flow on a vector toward the axis of rotation, a second row of diffuser blades configured to direct the fluid flow in the inward radial direction, and a third row of diffuser blades configured to accept the fluid flow in the inward radial direction from the second row of diffuser blades, first direct the fluid flow on a vector away from the axis of rotation, then direct the fluid flow in the axial direction, and then discharge the fluid flow from the diffuser stage in the axial direction.