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turbopump
A turbopump is a propellant pump with two main components: a rotodynamic pump and a driving gas turbine, usually both mounted on the same shaft, or sometimes geared together. The purpose of a turbopump is to produce a high pressure fluid for feeding a combustion chamber or other use.
A turbopump can comprise one of two types of pumps: centrifugal pump, where the pumping is done by throwing fluid outward at high speed; or axial flow pump, where alternating rotating and static blades progressively raise the pressure of a fluid.
Axial flow pumps have small diameters but give relatively modest pressure increases. Although multiple compression stages are needed, axial flow pumps work well with low density fluids. Centrifugal pumps are far more powerful for high density fluids but require large diameters for low density fluids.
Turbopumps operate in much the same way as turbocharger units for vehicles: higher fuel pressures allow fuel to be supplied to higher-pressure combustion chambers for higher performance engines.
==History==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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