Sediment erosion in the impeller of a double-suction centrifugal pump – A case study of the Jingtai Yellow River Irrigation Project, China

Shen, Zhengjing; Chu, Wuli; Li, Xiangjun; Dong, Wei

doi:10.1016/j.wear.2019.01.088

Cited by 69 publications

(33 citation statements)

References 30 publications

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“…The liquid phase water in this study is assumed as incompressible, and there is no heat exchange between liquid phase and solid phase. So the continuity equation and momentum equations of the liquid phase can be described as following (Shen et al 2019):…”

Section: Liquid Phase Equationmentioning

confidence: 99%

Erosion Wear on Impeller of Double-Suction Centrifugal Pump due to Sediment Flow

Shen¹,

Li²,

Wan-jin³

et al. 2020

JAFM

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Erosion wear of the centrifugal pump impeller are the key issues since its operating in sediment-laden flow. Experiment and numerical method are adopted in this study to investigate the erosion wear of the impeller in a double-suction pump in the Jingtai Yellow River Irrigation Project (JYRIP). Observation during operation combined with morphology study is carried out to verify erosion mechanisms at the different sections of the impeller blade. For numerical study, the Eulerian-Lagrangian approach combined with the Mclaury model is employed to predict the trajectories of the particles under different particle parameters. Also the effects of particle size and concentration on impeller erosion wear is studied. Numerical results are consistent with experimental data. The surface wear of the blade changes obviously from circular shape to strip shape in the direction from the Leading Edge (LE) to the Trailing Edge (TE), and the wear damage area increases correspondingly. Trajectories of larger particles are more uniform and tend to cause more severe erosion wear damage. The wear damage tends to be slow after the particle size increases to a certain extent under the same sediment concentration. Besides, erosion rate increases with an increase in sediment concentration, and the erosion rate of the suction side is greater than the pressure side at the same position of the blade surface. These results can offer a good reference for the design of wear resistance impeller of the double suction pump.

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Section: Liquid Phase Equationmentioning

confidence: 99%

Erosion Wear on Impeller of Double-Suction Centrifugal Pump due to Sediment Flow

Shen¹,

Li²,

Wan-jin³

et al. 2020

JAFM

View full text Add to dashboard Cite

show abstract

“…This numerical model, previously verified experimentally, showed that the erosion mainly occurs on the outer and lower surface and downstream pipe of U-bend. Nemitallah et al [15] pointed out the influence of flow rate, particle size, and pipe material on the erosion downstream of the sharp edge hole; although, research has suggested the particle shape also affects the erosion rate [16][17][18][19]. Desale et al [20] showed that the erosion of ductile materials is both a function of the size and hardness of the erosion agent and of its shape and density.…”

Section: Introductionmentioning

confidence: 99%

Multicomponent Water Effects on Rotating Machines Disk Erosion

Yang

Hou

et al. 2020

Water

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When sand particles are entrained into carrier flow, such as liquid, a strong interaction occurs with the surface of the metallic material, resulting in serious erosion damage. However, the effect of the physical properties of particles and materials on erosion characteristics has not been well studied. In this paper, the erosion-wear behavior of a rotating disc surface under the action of solid–liquid two-phase flow was studied by using the discrete particle model (DPM). The wear effects on the surface of sample due to particle diameter (d = 0.1 mm, d = 0.2 mm, d = 0.3 mm, d = 0.4 mm), particle volume fraction (CV = 2%, CV = 3%, CV = 4%, CV = 5%), and particle inlet velocity (v = 1.05 m/s, v = 2.05 m/s, v = 3.05 m/s, v = 4.05 m/s) were analyzed using representative values of operating conditions of rotating machines. The results show that the wear amount increases exponentially with the radius, whilst the maximum wear amount increases faster than the average wear amount with the particle volume fraction. The surface wear grows inversely with the particle diameter but slightly with the particle inlet velocity. A case study of stainless steel samples at different radius positions on the surface of rotating disc is carried out using a mixed velocity of sand and water of 2.05 m/s, an average particle size of 0.1 mm, and a concentration of CV = 2.5%. The experiments show the wear amount increases with the radius on the surface of the rotating disc, just as predicted by the numerical simulation. Two important findings emerge from the study: (1) the wear morphology of the specimen surface develops from two to three regions; (2) when the basal body is rotating at high speed, the wear degree is influenced more by the circumferential than particle inlet velocity. The wear morphology was observed by using a scanning electron microscope (SEM). It exhibited a mixture of fine and coarse scratches and pits, and the distribution of these varied according to the radial distance of the disc.

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“…As an energy consuming turbo-machine, the centrifugal pump is of urgent demand for energy source in the industry due to its energy-saving potential. It has been widely used for many applications, such as aviation and aerospace [1,2], micro-hydro-power plants [3,4], wind power generation [5,6], petroleum process [7], and agriculture irrigation [8]. Importantly, there is a growing recognition in the field of improving the performance of a centrifugal pump for a military aero-engine [9].…”

Section: Introductionmentioning

confidence: 99%

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

Wang

Wang³

et al. 2020

Energies

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Aero-fuel centrifugal pumps are important power plants in aero-engines. Unlike most of the existing centrifugal pumps, a combination impeller is integrated with the pump to improve performance. First, the critical geometrical parameters of the combination impeller and volute are given. Then, the effects of the combination impeller on the flow characteristics of the impeller and volute are clarified by comparing simulation results with that of the conventional impeller, where the effectiveness of the selected numerical method is validated by an acceptable agreement between simulation and experiment. Finally, the experiment is set to test the external performance of the studied pump. A significant feature of this study is that the flow characteristics are significantly ameliorated by reducing the flow losses that emerged in the impeller inlet, impeller outlet, and volute tongue. Correspondingly, the head and efficiency of a combination impeller are higher with comparison to a conventional impeller. Consequently, it is a promising approach in ameliorating the flow field and improving external performance by applying a combination impeller to an aero-fuel centrifugal pump.

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Sediment erosion in the impeller of a double-suction centrifugal pump – A case study of the Jingtai Yellow River Irrigation Project, China

Cited by 69 publications

References 30 publications

Erosion Wear on Impeller of Double-Suction Centrifugal Pump due to Sediment Flow

Erosion Wear on Impeller of Double-Suction Centrifugal Pump due to Sediment Flow

Multicomponent Water Effects on Rotating Machines Disk Erosion

Effects of a Combination Impeller on the Flow Field and External Performance of an Aero-Fuel Centrifugal Pump

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