Investigation of flow separation and secondary flow phenomena in a mixed-flow pump
Abstract
An investigation was conducted to reveal flow phenomena characteristic of a mixed-flow pump. A mixed-flow impeller and vaned, bowl diffuser combination was tested in a research pump facility to establish a baseline perfomance. Detailed measurements were obtained by traversing various pump-stage planes with a 5-hole, three-dimensional probe. Skin friction information was gathered using Preston tubes in both the vaneless space as well as the bowl diffuser. Using two and three-dimensional flow calculations, a modified vaned, bowl diffuser was designed, built an tested to minimize separated flow regions. Detailed measurements, again using three-dimensional probe traversing and Preston tubes, indicated suppressed regions of previously separated flow. The detailed flow structure correlated with a measured improvement in stage efficiency.
- Publication:
-
Three Dimensional Flow Phenomena in Fluid Machinery
- Pub Date:
- 1985
- Bibcode:
- 1985tdfp.proc....1H
- Keywords:
-
- Axial Flow Pumps;
- Computational Fluid Dynamics;
- Impellers;
- Separated Flow;
- Three Dimensional Flow;
- Two Dimensional Flow;
- Channel Flow;
- Skin Friction;
- Vaneless Diffusers;
- Vorticity;
- Wall Pressure;
- Fluid Mechanics and Heat Transfer