A studyof Radially-Curved, Mixed-Flow Vaneless Diffusers (Diffusers to Give Possibly small Static Pressure Gradient Normal to the Walls Over the Entire Flow Passage)

Abstract

For radially-curved, mixed-flow, vaneless diffusers, the authors previously clarified that diffusers which have a small static pressure gradient normal to the walls produce a favorable inner flow and high performance. Using this concept in this study, a design method was established to produce a small static pressure gradient normal to the walls at any section in a radially-curved, mixed-flow, vaneless diffuser flow passage. Flow measurements showed that a favorable inner flow and high performance could be obtained using this method.