Performance test and flow measurement of contra-rotating axial flow pump

Akinori Furukawa, Toru Shigemitsu, Satoshi Watanabe

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

An application of contra-rotating rotors has been proposed against a demand for developing higher specific speed axial flow pump. In the present paper, the advantage and disadvantage of using contra-rotating rotors are described in comparison with conventional type of rotor-stator, based on theoretical and experimental investigations. The advantages are as follows: (1) The pump is inherently designed as smaller sized and at lower rotational speed. (2) A stable head-characteristic curve for flow rate with negative slope appears. (3) As the rear rotor rotational speed is varied as independent control of front rotor, the wider range of high performance operation is obtained by rear rotor speed control in addition to front rotor speed control. The disadvantages are as follows: (1) The structure of double shaft system becomes complex. (2) The pump performance is inferior at over flow rate as the rear rotor loading is weakened. (3) The blade rows interaction from rear rotor to front rotor more strongly appears. Then the rear rotor design is a key to achieve higher pump performance. Some methods to overcome these disadvantages will be discussed in more details toward wider usage of contra-rotating axial flow pump in various industrial fields.

Original languageEnglish
Pages (from-to)7-13
Number of pages7
JournalJournal of Thermal Science
Volume16
Issue number1
DOIs
Publication statusPublished - Mar 1 2007

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axial flow pumps
performance tests
flow measurement
rotors
rotor speed
speed control
pumps
flow velocity
stators
blades
complex systems

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Performance test and flow measurement of contra-rotating axial flow pump. / Furukawa, Akinori; Shigemitsu, Toru; Watanabe, Satoshi.

In: Journal of Thermal Science, Vol. 16, No. 1, 01.03.2007, p. 7-13.

Research output: Contribution to journalArticle

Furukawa, Akinori ; Shigemitsu, Toru ; Watanabe, Satoshi. / Performance test and flow measurement of contra-rotating axial flow pump. In: Journal of Thermal Science. 2007 ; Vol. 16, No. 1. pp. 7-13.
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