Research on the effect of wear-ring clearances to the performance of centrifugal pump

Zhao, W G; Li, Y B; Wang, X Y; Sun, Jianhua; Wu, Guoying

doi:10.1088/1755-1315/15/7/072018

Cited by 6 publications

(2 citation statements)

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“…32 A few studies have been conducted that emphasize the significance of the leakage paths on the flow predictions in centrifugal pumps. Zhao et al 33 and Yan et al 34 studied the effect of variation of wear ring clearances and found that with an increase in the clearance gap, the performance drops. Kim and Yun 35 studied the effect of taking into account the balance holes in the impeller shroud.…”

Section: Introductionmentioning

confidence: 99%

The effect of secondary passages on cavitation and radial forces in a liquid propellant turbopump

Moganaradjou

Phukan

Vengadesan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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Numerical studies on rocket pumps are computationally expensive and hence the secondary passages such as sidewall clearance gaps, wear ring gaps, axial balancing mechanism, coolant/lubricant paths, etc. in the pump are usually not considered. In this study, a liquid propellant pump with and without secondary passages are modelled and flow simulation results are compared to analyse the differences in cavitation, vortices and radial force predictions arising due to the presence/absence of the secondary flow passages. Single-phase and multiphase simulations are conducted for the design and two off-design points. It is predicted that the presence of secondary passages has a significant effect on the type of cavitation instability predicted and on the volume of cavity generated in the inducer due to which the radial forces generated also differ significantly. The presence of secondary passages predicted large fluctuations from the average radial forces generated by the inducer. These are not obtained if the leakages are not considered. This type of underprediction during the design phase might cause severe wear and tear in the bearings during actual operation. Thus, this study stresses the need for incorporating the secondary passages even at the design stages. This study also highlights the possibility of cavitation instability type manipulation using some means in the inducer which would be significant for cavitation control research in rocket pumps.

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Section: Introductionmentioning

confidence: 99%

The effect of secondary passages on cavitation and radial forces in a liquid propellant turbopump

Moganaradjou

Phukan

Vengadesan

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…Since the wear ring clearance gap is an important part of the leakage flow paths in centrifugal pumps, it is necessary to pay enough attention to its influence. Increasing wear ring clearance can decrease pump head and efficiency, as illustrated in studies conducted by Chen et al [14], Zhao et al [15], and Wenguang [16]. Additionally, a strong hydraulic force can be developed when the impeller has a whirling motion in the housing [3].…”

Section: Introductionmentioning

confidence: 99%

Investigation into Transient Flow in a Centrifugal Pump with Wear Ring Clearance Variation

Liu

Ding

Dai

et al. 2014

Advances in Mechanical Engineering

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The leakage flow paths in the sidewall gaps of centrifugal pumps are of significant importance for numbers of effects. The paper is concerned with the transient flow in the leakage flow paths with wear ring clearance variation. For this purpose, numerical simulations of the whole pump were carried out. The grid dependence and yplus check were performed first. Additionally, experimental data of performance characteristic and pressure fluctuation inside the sidewall gap was used to validate the numerical results. The transient velocity fields inside the sidewall gaps during one blade passage period were simulated. And the leakage through the wear ring gap was obtained for all operating points investigated. To have a better idea of attenuation and propagation of pressure inside the sidewall gap, the unsteady pressure distributions in the gap were calculated. Additionally, the surfaces of the impeller were divided into four parts. The fluid force on each part was expressed as a percentage of the total radial force. Through comparing the flow fields, the pressure distributions, and the radial force between the pumps with different wear ring clearances, the effects of the wear ring clearance were discussed in detail. The results can be used to guide the optimum design of the pump sidewall gaps.

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Performance of centrifugal pump over a range of composite wear ring clearance

Ranawat

Miglani

Kankar

2022

J Braz. Soc. Mech. Sci. Eng.

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Research on the effect of wear-ring clearances to the performance of centrifugal pump

Cited by 6 publications

References 0 publications

The effect of secondary passages on cavitation and radial forces in a liquid propellant turbopump

The effect of secondary passages on cavitation and radial forces in a liquid propellant turbopump

Investigation into Transient Flow in a Centrifugal Pump with Wear Ring Clearance Variation

Performance of centrifugal pump over a range of composite wear ring clearance

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