Numerical Investigation of Performance Improvement and Erosion Characteristics of Vortex Pump Using Particle Model

Ye, Daoxing; Li, Hao; Ma, Qiuyan; Qi-biao, Han; Sun, Xiulu

doi:10.1155/2020/5103261

Cited by 5 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cheng et al [11] found that changes in the specific area of the balance bore caused changes in the centrifugal pump dust lifting and efficiency, and this provides an idea for improving the cavitation resistance of the pump. Ye et al [12] used a kriging approximation model to establish the relationship between the vortex pump geometry parameters and the vane efficiency and erosion rate, which provides a more reliable method for studying the optimization of the cavitation characteristics of a vortex pump. Ju et al [13] proposed an angular vane design, and compared with traditional radial straight vanes, two-and three-dimensional angular vanes can improve the hydraulic performance of a vortex pump in terms of the efficiency and head.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Inclined Part Length of an Inclined Blade on the Cavitation Characteristics of Vortex Pumps

Yin

Fan

et al. 2022

Machines

View full text Add to dashboard Cite

To study the effect of the length of the second inclined section of the inclined vane on the vortex structure and pressure distribution inside a vortex pump, this paper uses a combination of numerical simulations (CFD) and experimental verification methods to analyze the static pressure distribution of the internal flow field and the volume fraction distribution of the impeller bubble at different total inlet pressures as well as to analyze the volume and streamline of the distribution of the impeller bubble of the vortex pump at different instants. The results show that as the length of the second inclined section of the inclined vane increases, both the low-pressure area and the volume fraction of the vapor bubbles inside the impeller of the vortex pump increase, and the resistance to cavitation becomes worse. When the total inlet pressure of the impeller is low, a large number of vortices will be generated inside the flow channel of the vortex pump, leading to vortex cavitation; the longer the length of the inclined section, the larger the velocity gradient of the fluid and the more serious the phenomenon of deliquescence, leading to more intense cavitation, while a shorter inclined section length can effectively improve the anti-cavitation performance of the vortex pump.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the Inclined Part Length of an Inclined Blade on the Cavitation Characteristics of Vortex Pumps

Yin

Fan

et al. 2022

Machines

View full text Add to dashboard Cite

show abstract

Bubble breakage and aggregation characteristics in a vortex pump under bubble inflow

He,

Wang,

Liu

et al. 2023

Physics of Fluids

View full text Add to dashboard Cite

The behaviors of bubbles in a vortex pump play a crucial role in its performance when handling gas–liquid flows. However, not much research has been done on the distribution of the gas–liquid phases and the characteristics of bubble breakage and aggregation in vortex pumps. This lack of understanding hinders the improvement of pump performance in gas–liquid flow transport. This study aims to investigate the bubble characteristics in a vortex pump using the population balance model, focusing on the variation of bubble size and the influence of the inlet gas volume fraction (IGVF) on bubble breakage and aggregation. The results show that as the IGVF increases, the gas volume fraction in the impeller becomes larger than that in the bladeless chamber. The majority of bubbles in the impeller are concentrated near the hub, while they also remain in the circulating-flow zone of the bladeless chamber. Under low IGVF conditions, the average diameter of bubbles decreases from the pump inlet to the outlet. The bladeless chamber has a larger average bubble diameter and a higher percentage of large bubbles compared to other parts of the pump. Moreover, the bubble number density at the pump outlet increases with the IGVF, indicating the production of more bubbles, while the increase in IGVF also results in an increase in the percentage of large bubbles. The study also discusses the mechanism of bubble breakage and aggregation in vortex pumps. It suggests that the effective breakage frequency and effective aggregation frequency are responsible for bubble breakage and aggregation in the vortex pump. The gas volume fraction and turbulent dissipation rate are identified as important parameters affecting the effective breakage and aggregation frequency. These findings provide new insights into understanding the characteristics of bubble breakage and aggregation in vortex pumps.

show abstract

Effects of interface model on performance of a vortex pump in CFD simulations

2024

International Journal of Fluid Engineering

View full text Add to dashboard Cite

That the predicted head of a vortex pump is higher than that measured experimentally is very common in simulations of turbulent flow in such pumps. To identify why, reported here is a study of the turbulent flow of water in a vortex pump with a specific speed of 76 and fluid domains with 1/8-impeller and whole-impeller geometrical models and smooth walls using the 3D steady Reynolds-averaged Navier–Stokes equations, the standard k–ɛ model, and a scalable wall function in ANSYS CFX 2019 R2. The results show that the aforementioned phenomenon is related to the choice of interface model. With the 1/8-impeller model, the head predicted by the frozen rotor model agrees with the experimental head. By contrast, the transient rotor model provides a reasonably accurate head against the experimental head but requires huge computing resources and overestimates the pump efficiency, and the stage model is unsuitable for predicting the head of the pump. The flow patterns in the vaneless chamber and impeller predicted with the 1/8-impeller model are more uniform because of artificial fluid mixing on the interface than those predicted with the whole-impeller model by using the frozen rotor model, and the flow patterns predicted with the whole-impeller model by using the transient rotor model are in between. The hydraulic performance of the pump is predicted with the 1/8-impeller model and frozen rotor model at various viscosities, and the flow-rate, head, and efficiency correction factors are determined and correlated with the impeller Reynolds number.

show abstract

Numerical Investigation of Performance Improvement and Erosion Characteristics of Vortex Pump Using Particle Model

Cited by 5 publications

References 11 publications

Effect of the Inclined Part Length of an Inclined Blade on the Cavitation Characteristics of Vortex Pumps

Effect of the Inclined Part Length of an Inclined Blade on the Cavitation Characteristics of Vortex Pumps

Bubble breakage and aggregation characteristics in a vortex pump under bubble inflow

Effects of interface model on performance of a vortex pump in CFD simulations

Contact Info

Product

Resources

About