A DIFFUSER FOR A MULTIPHASE FLUID COMPRESSOR PUMP

摘要

A diffuser (1) for a multiphase fluid pump is disclosed, the diffuser comprising a central hub (8) coaxially aligned with a surrounding shroud (6). The hub and shroud forms together an annular passage (10) for fluid flow (F) through the diffuser. A set of diffusor blades (7) are arranged angularly spaced about the hub, the blades connecting the hub and the shroud while projecting a pressure side (16) towards the flow (F). The diffusor blades (7) are saddle- shaped such that in any radial plane (IV-IV; V-V) intersecting a diffusor blade, the diffusor blade projects a convexly curved pressure side (16) towards the flow, whereas in any tangential plane (III-III) intersecting the diffuser blade the diffusor blade projects a concavely curved pressure side ( 16) towards the flow.