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.
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ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference
July 6–10, 2003
Honolulu, Hawaii, USA
Conference Sponsors:
- Fluids Engineering Division
ISBN:
0-7918-3697-5
PROCEEDINGS PAPER
Experimental Study on Unstable Characteristics of Mixed-Flow Pump at Low Flow-Rates Available to Purchase
Hiroshi Funakoshi,
Hiroshi Funakoshi
Kyushu Institute of Technology, Kitakyushu, Japan
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Hiroshi Tsukamoto,
Hiroshi Tsukamoto
Kyushu Institute of Technology, Kitakyushu, Japan
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Koji Miyazaki,
Koji Miyazaki
Kyushu Institute of Technology, Kitakyushu, Japan
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Kazuyoshi Miyagawa
Kazuyoshi Miyagawa
Mitsubishi Heavy Industries, Ltd., Takasago, Japan
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Hiroshi Funakoshi
Kyushu Institute of Technology, Kitakyushu, Japan
Hiroshi Tsukamoto
Kyushu Institute of Technology, Kitakyushu, Japan
Koji Miyazaki
Kyushu Institute of Technology, Kitakyushu, Japan
Kazuyoshi Miyagawa
Mitsubishi Heavy Industries, Ltd., Takasago, Japan
Paper No:
FEDSM2003-45103, pp. 609-614; 6 pages
Published Online:
February 4, 2009
Citation
Funakoshi, H, Tsukamoto, H, Miyazaki, K, & Miyagawa, K. "Experimental Study on Unstable Characteristics of Mixed-Flow Pump at Low Flow-Rates." Proceedings of the ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. Volume 2: Symposia, Parts A, B, and C. Honolulu, Hawaii, USA. July 6–10, 2003. pp. 609-614. ASME. https://doi.org/10.1115/FEDSM2003-45103
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