TY - GEN
T1 - Experimental study on unstable characteristics of mixed-flow pump at low flow-rates
AU - Funakoshi, Hiroshi
AU - Tsukamoto, Hiroshi
AU - Miyazaki, Koji
AU - Miyagawa, Kazuyoshi
PY - 2003/12/1
Y1 - 2003/12/1
N2 - 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.
AB - 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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M3 - Conference contribution
AN - SCOPUS:0347535162
SN - 0791836967
T3 - Proceedings of the ASME/JSME Joint Fluids Engineering Conference
SP - 609
EP - 614
BT - Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference
A2 - Ogut, A.
A2 - Tsuji, Y.
A2 - Kawahashi, M.
A2 - Ogut, A.
A2 - Tsuji, Y.
A2 - Kawahashi, M.
T2 - 4th ASME/JSME Joint Fluids Engineering Conference
Y2 - 6 July 2003 through 10 July 2003
ER -