As the name suggests, a turbopump comprises basically two main components: a rotodynamic pump and a driving turbine, both mounted on the same shaft. A turbopump can refer to either of two types of pumps: centrifugal, where the pumping's done by throwing fluid outward at high speed; or axial, where alternating rotating and static blades progressively raise the pressure of a fluid. Axial flow pumps have small diameters, and are used for this reason in duct jet engines, but give relatively modest p… (More on Turbopump)