Transient Characteristics of a Centrifugal Pump During Starting Period

Tsukamoto, H.; Ohashi, Hideo

doi:10.1115/1.3240859

Cited by 112 publications

(58 citation statements)

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“…Similar to the results obtained by Tsukamoto [1] and Lefebvre [5], acceleration has a profound effect on the transient characteristics of a centrifugal pump. The transient performance has an obvious difference from the quasi-steady assumption results, and the peak value of head is markedly affected by the acceleration rate.…”

Section: Transient Performance Of Non-cavitation Pumpsupporting

confidence: 84%

“…In recent years, more attention has been paid to the transient performance of pumps because of the growing engineering application needs. Tsukamoto et al [1,2] carried out an experimental and numerical study which investigated transient characteristics of a centrifugal pump during starting and stopping period. Results showed that the impulsive pressure and the lag in circulation formation around impeller vanes play dominant roles in the difference between dynamic and quasi-steady pump characteristics during the starting period.…”

Section: Introductionmentioning

confidence: 99%

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Experimental study on hydrodynamic performance of a cavitating centrifugal pump during transient operation

Wang

Hao³

et al. 2010

J Mech Sci Technol

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An experimental study has been carried out in order to analyze the cavitation of a centrifugal pump and its effect on transient hydrodynamic performance during transient operation. The transient characteristics of the centrifugal pump were tested under various suction pressure and starting conditions. In transient operation of continuous starting and stopping process, instantaneous rotational speed, head, flow rate and suction pressure of the pump were measured. The effect of cavitation on transient performance of the centrifugal pump during transient operation was analyzed, and then the effects of starting acceleration rate and suction pressure of pump on cavitation were presented. Results showed that the cavitation would be delayed during rapid starting period. However, in the condition of low suction pressure and high rotational speed, pump cavitation is inescapable even if the starting period is less than a second. After the serious transient cavitation occurred, the transient performance of centrifugal pump would decline obviously, and the instantaneous head of pump would fluctuate.

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Section: Transient Performance Of Non-cavitation Pumpsupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Experimental study on hydrodynamic performance of a cavitating centrifugal pump during transient operation

Wang

Hao³

et al. 2010

J Mech Sci Technol

View full text Add to dashboard Cite

show abstract

“…Once the pump starts, the impeller rotational speed grows with time until the design value and the flow field inside the pump gradually enter a stable circulating state (Saito, 1982;Tsukamoto & Ohashi, 1982). The simulations were designed to study the transient solid-liquid flow fields but without factoring in the contributions due to the transient response of the impeller, in order to preserve reasonable computational efficiency.…”

Section: Transient Analysismentioning

confidence: 99%

Transient numerical simulation for solid-liquid flow in a centrifugal pump by DEM-CFD coupling

Huang

Qiu

2015

Engineering Applications of Computational Fluid Mechanics

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The two-phase solid-liquid flow in the computational fluid dynamic (CFD) method is generally analyzed by treating the solid particles as a quasi-fluid element, but this does not take into account the effects of the physical features of the solid particles and collisions among the particles. In this study, the discrete element method (DEM) was coupled with the CFD method in order to analyze the transient two-phase solid-liquid flow in a single-stage centrifugal pump with consideration for the particle-particle and particle-structure interactions. The numerical simulation process involving EDEM and FLUENT is described. Simulations were performed for the water at 25âĎČ at the continuous phase together with 15% of the volume as spherical solid particles (density ρ = 1500 kg/m 3 ) with the diameter ranging from 1 to 3 mm in a random order. The results illustrate the motion of the solid particles in the pump and their effect on the flow performance of the pump in terms of time variation in the head. The velocity fields for the two-phase flow together with the volume fraction distributions and trajectories of the solid particles in the centrifugal pump are also presented.

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“…This paper describes a procedure how to get the extended characteristic from measurement of fast pump deceleration in a simple hydraulic circuit. There is a lot of articles dealing with the problem of pump deceleration [2], [3] or acceleration [4], [5], [6], but authors found only little information about reconstruction of pump characteristic from measurement of this transients.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of pump characteristic from measurement of fast deceleration

Himr

2015

EPJ Web of Conferences

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Abstract.Article describes an experiment where a pump connected to the simple hydraulic circuit is decelerated. Since the deceleration is fast enough the operating point of the machine moves from the initial steady position to the breaking zone, turbine zone and back to the new steady position. A dependence of the specific energy and the torque on the flow rate was evaluated from the measurement of the input and output pressure, torque and rotational speed recorded during the deceleration. Obtained characteristic is much wider than curves obtained from regular measurement of steady state.

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Transient Characteristics of a Centrifugal Pump During Starting Period

Cited by 112 publications

References 0 publications

Experimental study on hydrodynamic performance of a cavitating centrifugal pump during transient operation

Experimental study on hydrodynamic performance of a cavitating centrifugal pump during transient operation

Transient numerical simulation for solid-liquid flow in a centrifugal pump by DEM-CFD coupling

Evaluation of pump characteristic from measurement of fast deceleration

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