Experimental study on unstable characteristics of mixed-flow pump at low flow-rates

Hiroshi Funakoshi, Hiroshi Tsukamoto, Koji Miyazaki, Kazuyoshi Miyagawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Static and dynamic characteristics of a mixed flow pump were measured at low flow rate, where the steady characteristic curves show a positive slope. Unsteady flow was measured at upstream and downstream of impeller, as well as on the casing wall of diffuser passage by using a fast response five-hole pitot tube and semi-conductor type pressure transducers. Dynamic response of the pump to the sinusoidal change in flow rate was measured under constant rotational speed. As a result of the unsteady flow measurements, the positive slope of steady characteristic was found to be caused by the impeller tip separation, inlet backflow, and pre-rotation. Moreover, the dynamic characteristics of the pump were found to become unstable with the increased frequency of flow rate.

Original languageEnglish
Title of host publicationProceedings of the ASME/JSME Joint Fluids Engineering Conference
EditorsA. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, M. Kawahashi
Pages609-614
Number of pages6
Volume1 A
Publication statusPublished - 2003
Externally publishedYes
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI
Duration: 2003 Jul 62003 Jul 10

Other

Other4th ASME/JSME Joint Fluids Engineering Conference
CityHonolulu, HI
Period03/7/603/7/10

Fingerprint

Flow rate
Pumps
Unsteady flow
Pressure transducers
Flow measurement
Dynamic response

ASJC Scopus subject areas

  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

Cite this

Funakoshi, H., Tsukamoto, H., Miyazaki, K., & Miyagawa, K. (2003). Experimental study on unstable characteristics of mixed-flow pump at low flow-rates. In A. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, & M. Kawahashi (Eds.), Proceedings of the ASME/JSME Joint Fluids Engineering Conference (Vol. 1 A, pp. 609-614)

Experimental study on unstable characteristics of mixed-flow pump at low flow-rates. / Funakoshi, Hiroshi; Tsukamoto, Hiroshi; Miyazaki, Koji; Miyagawa, Kazuyoshi.

Proceedings of the ASME/JSME Joint Fluids Engineering Conference. ed. / A. Ogut; Y. Tsuji; M. Kawahashi; A. Ogut; Y. Tsuji; M. Kawahashi. Vol. 1 A 2003. p. 609-614.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Funakoshi, H, Tsukamoto, H, Miyazaki, K & Miyagawa, K 2003, Experimental study on unstable characteristics of mixed-flow pump at low flow-rates. in A Ogut, Y Tsuji, M Kawahashi, A Ogut, Y Tsuji & M Kawahashi (eds), Proceedings of the ASME/JSME Joint Fluids Engineering Conference. vol. 1 A, pp. 609-614, 4th ASME/JSME Joint Fluids Engineering Conference, Honolulu, HI, 03/7/6.
Funakoshi H, Tsukamoto H, Miyazaki K, Miyagawa K. Experimental study on unstable characteristics of mixed-flow pump at low flow-rates. In Ogut A, Tsuji Y, Kawahashi M, Ogut A, Tsuji Y, Kawahashi M, editors, Proceedings of the ASME/JSME Joint Fluids Engineering Conference. Vol. 1 A. 2003. p. 609-614
Funakoshi, Hiroshi ; Tsukamoto, Hiroshi ; Miyazaki, Koji ; Miyagawa, Kazuyoshi. / Experimental study on unstable characteristics of mixed-flow pump at low flow-rates. Proceedings of the ASME/JSME Joint Fluids Engineering Conference. editor / A. Ogut ; Y. Tsuji ; M. Kawahashi ; A. Ogut ; Y. Tsuji ; M. Kawahashi. Vol. 1 A 2003. pp. 609-614
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