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 4th ASME/JSME Joint Fluids Engineering Conference
Subtitle of host publicationVolume 1, Part A, Forums
EditorsA. Ogut, Y. Tsuji, M. Kawahashi, A. Ogut, Y. Tsuji, M. Kawahashi
Pages609-614
Number of pages6
Publication statusPublished - 2003 Dec 1
Event4th ASME/JSME Joint Fluids Engineering Conference - Honolulu, HI, United States
Duration: 2003 Jul 62003 Jul 10

Publication series

NameProceedings of the ASME/JSME Joint Fluids Engineering Conference
Volume1 A

Conference

Conference4th ASME/JSME Joint Fluids Engineering Conference
CountryUnited States
CityHonolulu, HI
Period03/7/603/7/10

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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 4th ASME/JSME Joint Fluids Engineering Conference: Volume 1, Part A, Forums (pp. 609-614). (Proceedings of the ASME/JSME Joint Fluids Engineering Conference; Vol. 1 A).