Research on the Relationship between Sediment Concentration and Centrifugal Pump Performance Parameters Based on CFD Mixture Model

Wu, Xinhao; Su, Peilan; Wu, Jihuai; Zhang, Yusheng; Wang, Baohe

doi:10.3390/en15197228

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…In this paper, we used FLUENT 19.2 software [30][31][32][33][34] to simulate the water flow inside the tesla-shaped emitter channel, without considering the compressibility, mass force, and temperature variation of the water flow. The governing equations included the continuity equation and Navier-Stokes [35]:…”

Section: Governing Equationsmentioning

confidence: 99%

Hydraulic Performance and Energy Dissipation Mechanism Analysis of the Tesla-Shaped Emitter

Hao

et al. 2023

Energies

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In this paper, a tesla-shaped emitter is proposed based on the structure of the “tesla valve” as the source of inspiration, so that the water flow in the channel would produce a variety of energy dissipation phenomena, such as diversion, hedging, and mixing, to explore the hydraulic performance and energy dissipation mechanism of the tesla-shaped emitter. The channel structure parameters were taken as factors, and 16 groups of orthogonal tests were arranged. Based on CFD technology, the pressure–flow relationship curve slope, flow ratio between the main channel and secondary channel, flow field, and head loss of the emitter were calculated and analyzed for different combinations of structural parameters. Based on a significance level α = 0.05 test, the main channel inlet section length (L3) had a significant impact on the curve slope, and the secondary channel length (L1) and main channel inlet section length (L3) had a significant impact on the flow. The multiple linear regression mathematical models between the channel structure parameters and the curve slope and the flow were constructed. The larger the ratio between the main channel and the secondary channel flow, the better the hydraulic performance of the emitter. The channel unit loss coefficient increased linearly with the increase of the emitter inlet pressure, and its value ranged from 4.5769 to 8.1716, with an excellent energy dissipation effect. The hedge mixing of the water flow was the core of the energy dissipation of the tesla-shaped emitter. By appropriately increasing the inlet size of the main channel and other elements to increase the main channel flow and optimize the flow ratio between the main channel and the secondary channel, the mixing was improved, which consequently improved the hydraulic performance of the emitter.

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Section: Governing Equationsmentioning

confidence: 99%

Hydraulic Performance and Energy Dissipation Mechanism Analysis of the Tesla-Shaped Emitter

Hao

et al. 2023

Energies

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Design and structural parameter optimization of Venturi-type microbubble reactor for wastewater treatment by CFD simulation

Liu,

Li,

Zhao

et al. 2024

J Flow Chem

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Research on Two-Phase Flow and Wear of Inlet Pipe Induced by Fluid Prewhirl in a Centrifugal Pump

Chen,

et al. 2024

JMSE

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In deep-sea mining hydraulic lifting systems, centrifugal pumps are very important as power units. In the process of transportation, the fluid prewhirl phenomenon in the impeller inlet will lead to changes in the state of motion of the particles and fluid and cause the wear of the inlet pipe, which can lead to centrifugal pump failure in serious cases. In this paper, a numerical simulation of the centrifugal pump is carried out based on the CFD-DEM coupling method to analyze the influence of the prewhirl on the wear of the inlet pipe. The results show that the velocity streamline near the impeller inlet position changes significantly. The flow field velocity increases along the radial direction of the inlet pipe, and it has a maximum value at r/R = 0.98. The prewhirl flow pulls the particles to change their original motion direction, and the area where the particles are subjected to high fluid force is concentrated between 0.5 d/D and 1 d/D, about 0.015 to 0.018 N, resulting in the uneven distribution of particles. The high-wear area appears in the bottom-left area (specifically, L4, L9, and L13), and this is also the location of the largest cumulative force; the high-wear area shows a triangle. The collision energy loss of particles increases due to the influence of the prewhirl, which leads to an increase in wear.

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Research on the Relationship between Sediment Concentration and Centrifugal Pump Performance Parameters Based on CFD Mixture Model

Cited by 3 publications

References 31 publications

Hydraulic Performance and Energy Dissipation Mechanism Analysis of the Tesla-Shaped Emitter

Hydraulic Performance and Energy Dissipation Mechanism Analysis of the Tesla-Shaped Emitter

Design and structural parameter optimization of Venturi-type microbubble reactor for wastewater treatment by CFD simulation

Research on Two-Phase Flow and Wear of Inlet Pipe Induced by Fluid Prewhirl in a Centrifugal Pump

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