Hydrodynamic forces on the impeller of a waterjet propulsion system

B.P.M. Esch, van; N.W.H. Bulten

Hydrodynamic forces on the impeller of a waterjet propulsion system

B.P.M. Esch, van, N.W.H. Bulten

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Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

In a waterjet system, a mixed-flow pump is used for ship propulsion. The suction flow to this pump is highly non-uniform due to the boundary layer under the hull of the ship and the shape of the inlet duct. Even at normal operating conditions, variations in axial velocity can be as high as 50 percent of the average value. This paper presents an experimental investigation of the resulting hydrodynamic forces on the impeller. Measurements are performed on a scale model of a commercial waterjet pump. A newly designed dynamometer is used to measure the instantaneous forces and bending moments. This dynamometer is built between the impeller and the shaft of the pump and co-rotates with the impelier. Various suction flow distributions to the pump are achieved by means of a device situated in the suction pipe. Results of measurements show the influence of the suction flow and blade interaction on forces. Among the most important observations are a backward whirling motion of the rotor system and a considerable steady radial force with an upward component.

Original language	English
Title of host publication	Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006
Editors	T. Lajos, J. Vad
Place of Publication	Budapest
Publisher	Budapest University of Technology and Economics
Pages	1103-1109
Volume	2
ISBN (Print)	963-06-0382-9
Publication status	Published - 2006
Event	conference; CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary; 2006-09-06; 2006-09-09 - Duration: 6 Sept 2006 → 9 Sept 2006

Conference

Conference	conference; CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary; 2006-09-06; 2006-09-09
Period	6/09/06 → 9/09/06
Other	CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary

Cite this

Esch, van, B. P. M., & Bulten, N. W. H. (2006). Hydrodynamic forces on the impeller of a waterjet propulsion system. In T. Lajos, & J. Vad (Eds.), Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006 (Vol. 2, pp. 1103-1109). Budapest University of Technology and Economics.

Esch, van, B.P.M. ; Bulten, N.W.H. / Hydrodynamic forces on the impeller of a waterjet propulsion system. Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006. editor / T. Lajos ; J. Vad. Vol. 2 Budapest : Budapest University of Technology and Economics, 2006. pp. 1103-1109

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title = "Hydrodynamic forces on the impeller of a waterjet propulsion system",

abstract = "In a waterjet system, a mixed-flow pump is used for ship propulsion. The suction flow to this pump is highly non-uniform due to the boundary layer under the hull of the ship and the shape of the inlet duct. Even at normal operating conditions, variations in axial velocity can be as high as 50 percent of the average value. This paper presents an experimental investigation of the resulting hydrodynamic forces on the impeller. Measurements are performed on a scale model of a commercial waterjet pump. A newly designed dynamometer is used to measure the instantaneous forces and bending moments. This dynamometer is built between the impeller and the shaft of the pump and co-rotates with the impelier. Various suction flow distributions to the pump are achieved by means of a device situated in the suction pipe. Results of measurements show the influence of the suction flow and blade interaction on forces. Among the most important observations are a backward whirling motion of the rotor system and a considerable steady radial force with an upward component.",

author = "{Esch, van}, B.P.M. and N.W.H. Bulten",

year = "2006",

language = "English",

isbn = "963-06-0382-9",

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pages = "1103--1109",

editor = "T. Lajos and J. Vad",

booktitle = "Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006",

publisher = "Budapest University of Technology and Economics",

note = "conference; CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary; 2006-09-06; 2006-09-09 ; Conference date: 06-09-2006 Through 09-09-2006",

}

Esch, van, BPM & Bulten, NWH 2006, Hydrodynamic forces on the impeller of a waterjet propulsion system. in T Lajos & J Vad (eds), Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006. vol. 2, Budapest University of Technology and Economics, Budapest, pp. 1103-1109, conference; CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary; 2006-09-06; 2006-09-09, 6/09/06.

Hydrodynamic forces on the impeller of a waterjet propulsion system. / Esch, van, B.P.M.; Bulten, N.W.H.
Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006. ed. / T. Lajos; J. Vad. Vol. 2 Budapest: Budapest University of Technology and Economics, 2006. p. 1103-1109.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Hydrodynamic forces on the impeller of a waterjet propulsion system

AU - Esch, van, B.P.M.

AU - Bulten, N.W.H.

PY - 2006

Y1 - 2006

N2 - In a waterjet system, a mixed-flow pump is used for ship propulsion. The suction flow to this pump is highly non-uniform due to the boundary layer under the hull of the ship and the shape of the inlet duct. Even at normal operating conditions, variations in axial velocity can be as high as 50 percent of the average value. This paper presents an experimental investigation of the resulting hydrodynamic forces on the impeller. Measurements are performed on a scale model of a commercial waterjet pump. A newly designed dynamometer is used to measure the instantaneous forces and bending moments. This dynamometer is built between the impeller and the shaft of the pump and co-rotates with the impelier. Various suction flow distributions to the pump are achieved by means of a device situated in the suction pipe. Results of measurements show the influence of the suction flow and blade interaction on forces. Among the most important observations are a backward whirling motion of the rotor system and a considerable steady radial force with an upward component.

AB - In a waterjet system, a mixed-flow pump is used for ship propulsion. The suction flow to this pump is highly non-uniform due to the boundary layer under the hull of the ship and the shape of the inlet duct. Even at normal operating conditions, variations in axial velocity can be as high as 50 percent of the average value. This paper presents an experimental investigation of the resulting hydrodynamic forces on the impeller. Measurements are performed on a scale model of a commercial waterjet pump. A newly designed dynamometer is used to measure the instantaneous forces and bending moments. This dynamometer is built between the impeller and the shaft of the pump and co-rotates with the impelier. Various suction flow distributions to the pump are achieved by means of a device situated in the suction pipe. Results of measurements show the influence of the suction flow and blade interaction on forces. Among the most important observations are a backward whirling motion of the rotor system and a considerable steady radial force with an upward component.

M3 - Conference contribution

SN - 963-06-0382-9

VL - 2

SP - 1103

EP - 1109

BT - Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006

A2 - Lajos, T.

A2 - Vad, J.

PB - Budapest University of Technology and Economics

CY - Budapest

T2 - conference; CMFF'06 : Conference on modelling fluid flow : 13th international conference on fluid flow, September 6-9 2006, Budapest, Hungary; 2006-09-06; 2006-09-09

Y2 - 6 September 2006 through 9 September 2006

ER -

Esch, van BPM, Bulten NWH. Hydrodynamic forces on the impeller of a waterjet propulsion system. In Lajos T, Vad J, editors, Conference on Modelling Fluid Flow : CMFF '06 : proceedings of the 13th international conference on fluid flow technologies, Budapest, Hungary, September 6-9 2006. Vol. 2. Budapest: Budapest University of Technology and Economics. 2006. p. 1103-1109

Hydrodynamic forces on the impeller of a waterjet propulsion system

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