Tomographic investigations on centrifugal pumps conveying gas-liquid two phase flow


Tomographic investigations on centrifugal pumps conveying gas-liquid two phase flow

Schäfer, T.; Neumann, M.; Bieberle, A.; Hampel, U.

This contribution presents an investigation study of two-phase flow distribution in an industrial centrifugal pump and its effect to the hydrodynamic behaviour. Therefore, high-resolution gamma-ray computed tomography has been applied especially in the impeller region of an industrial centrifugal pump. To observe gas-liquid phase distributions within a sharply mapped impeller wheel, which rotates with up to 1900 rpm, time-averaged rotation-synchronized computed tomography as well as radiography has been applied. The accumulation of the gas phase was studied for varying injected gas volume fractions and flow regimes. Furthermore, various internally accumulated gas holdup patterns could be identified and, eventually, associated with characteristic pump performance behaviours. Moreover, the measuring method allowed gas holdup analysis in each chamber of the impeller wheel along selected streamlines. As a result, specific phase holdup profiles could be evaluated.

Keywords: gamma-ray computed tomography; centrifugal pump; two-phase flow; gas entrainment

  • Lecture (Conference)
    7th International Symposium on Process Tomography (ISPT7), 01.-03.09.2015, Dresden, Deutschland
  • Contribution to proceedings
    7th International Symposium on Process Tomography (ISPT7), 01.-03.09.2015, Dresden, Deutschland
    Proceedings of the 7th International Symposium on Process Tomography

Permalink: https://www.hzdr.de/publications/Publ-22251
Publ.-Id: 22251