Air/water two-phase flow performance of contra-rotating axial flow pump and rotational speed control of rear rotor

Akinori Furukawa, Toru Shigemitsu, Tomoya Takano, Kusuo Okuma, Satoshi Watanabe

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

An application of contra-rotating rotors, consisting of front and rear rotors rotating in the opposite direction each other, has been proposed against a demand for developing higher specific speed axial flow pump with more compact structure, higher efficiency and better cavitation performance. Air/water two-phase flow performance of contra-rotating pump has to be, also, investigated as axial flow pumps are used for standby operations of air-lock and air/water mixing discharge to prevent floods. In the present paper, experimental results on air/water two-phase flow performance of test pump of contra-rotating rotors (RR1 Type) are shown and compared with those of conventional axial flow pump, consisting of a front rotor and a rear stator. Effects of changes of rear rotor rotational speed, which is an advantage of contra-rotating axial flow pump, on two-phase flow performance of RR1 type are discussed. It is shown that air/water two-phase flow performance of contra-rotating axial flow pump is capable to be improved by this control procedure for rear rotor rotational speed.

Original languageEnglish
Pages (from-to)2047-2052
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume71
Issue number708
DOIs
Publication statusPublished - Aug 2005

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering

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