Investigation on the effect of forward skew angle blade on the hump characteristic in a mixed flow pump using modified partially averaged Navier-Stokes model

Weixiang Ye, Akihiro Ikuta, Yining Chen, Kazuyoshi Miyagawa, Xianwu Luo

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

A mixed flow pump is regarded as an important power facility in the hydropower field for renewable energy. Pump impeller design shows a great attempt to alleviate the hump characteristic and suppress the severe pressure fluctuations as the mixed flow pumps operate under part-load conditions. In this respect, an advanced turbulence model, i.e., modified SST k-ω partially averaged Navier-Stokes (MSST PANS) model, was adopted to numerically investigate the effect of forward skew angle blade on the hump characteristic using different impeller blades. Both experimental and numerical results indicate that the pump with forward skew angle blade shifts the hump region to the deeper part-load region. In the pump impeller with the forward skew angle blades, a synchronous stall cell is observed near the blade leading edge and near the hub side, while typical rotating stall cell evolution is observed in the conventional pump impeller. Analysis on the blade loading also indicates that under the unstable condition, the forward skew angle blade could switch the mid-loaded distribution to the fore-loaded distribution. Finally, the low frequency pressure fluctuations induced by the rotating stall cell evolution could be also eliminated successfully as the forward skew angle impeller blades are adopted.

Original languageEnglish
Pages (from-to)118-132
Number of pages15
JournalRenewable Energy
Volume170
DOIs
Publication statusPublished - 2021 Jun

Keywords

  • Forward skew angle blade
  • Hump characteristic
  • MSST PANS turbulence Model
  • Mixed flow pump
  • Rotating stall
  • Synchronous stall cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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