CFD characterization and optimization of the cavitation phenomenon in dredging centrifugal pumps

Ramı́rez, Rafael; Ávila, Enrique Delgado; Taborda, Luis Lisandro Lopez; Bula, Antonio; Forero, Jorge Duarte

doi:10.1016/j.aej.2019.12.041

Cited by 32 publications

(22 citation statements)

References 34 publications

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“…The contact surface of the front cavity area with the impeller is set as a rotating wall surface with the same speed as the impeller, and the rest of the stationary wall surface is set as a non-slip wall surface. Since the RNG k-ε model modifies the coefficients in the standard k-ε model, it can better predict the rotating flow (Ramirez et al, 2020). This paper uses the RNG k-ε model to calculate the three-dimensional incompressible viscous turbulent flow inside the pump.…”

Section: Cells Independence Analysis Of Numerical Simulationmentioning

confidence: 99%

Numerical simulation of the influence of mixed sand on erosion characteristics of centrifugal pump

Wang¹,

Wang²,

Chen³

et al. 2022

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PurposeThe purpose of the paper is to predict the erosion rate of the components of centrifugal pump under certain operating condition to identify the maximum erosion area and to discuss the factors affecting them. This helps to optimize design and estimate service life.Design/methodology/approachIn the paper, the Eulerian–Lagrangian approach method coupled with the erosion model to investigate the mixed sand characteristics on erosion characteristics of centrifugal pump flow-through wall. The hydraulic performance and wear characteristics experiment of the pump is used to verify the accuracy of the numerical simulation.FindingsThe blade erosion area mainly occurs near the blade inlet and the trailing edge of the pressure surface, the main erosion area of the impeller back shroud is near the outlet of the flow passage and the main erosion area of the volute is near the tongue and the I section. With the change of the average diameter and density of sand particles, the average erosion rate on different flow-through walls is positively correlated with the average mass concentration to a certain extent. However, for different sand shape factors, there is little correlation between the average erosion rate and the average mass concentration. In addition, compared with other erosion areas, the increase of average sand particle diameter and density has the greatest impact on the total erosion rate of blade pressure surface, while the shape of sand particles has a greater impact on the total erosion rate of each flow-through wall of centrifugal pump.Originality/valueIn this work, according to the characteristics of the mixed distribution of different sand diameters in the Yellow River Basin, the erosion characteristics of centrifugal pumps used in the Yellow River Basin are studied. The numerical calculation method for predicting the wall erosion of centrifugal pump is established and compared with the experimental results. The results can provide reference for optimizing design and increasing service life.

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Section: Cells Independence Analysis Of Numerical Simulationmentioning

confidence: 99%

Numerical simulation of the influence of mixed sand on erosion characteristics of centrifugal pump

Wang¹,

Wang²,

Chen³

et al. 2022

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“…Untuk meminimalisasi error akibat jumlah iterasi yang terbatas, dilakukan pengamatan pada nilai residual persamaan atur. Nilai residual tersebut akan menentukan konvergensi hasil simulasi [13]. Hasil plotting residual terhadap jumlah iterasi disajikan di Gambar 2.…”

Section: Konvergensi Independensi Mesh Dan Validasiunclassified

Analisis Kinerja Pompa Sentrifugal pada Variasi Trim Diameter Menggunakan Simulasi Numerik

Waluyo

Mahardhika

Waluyo

2021

JRM

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Diameter trimming is one of the most common modification on centrifugal pump impeller aimed to keep conformity between pump performance and required head and flow rate. In its application, centrifugal pump performance with trimmed diameter could be predicted by using affinity equations which based on geometrical similarity between pre- and post-trimming impeller. However, diameter trimming also alter the dimension ratio in blade passage which prompt further investigation on performance prediction of pump with trimmed impeller diameter. This research is carried out by using numerical simulation to analyze performance of pump with trimmed impeller diameter. The simulation is conducted on radial-type centrifugal pump with impeller diameter 105 mm, inlet blade angle 200, outlet blade angle 280, and operating on mass flow rate 1.5 kg/s at rotational speed 2800 rpm. RNG k-e model is used to model turbulence while trimmed diameter values are 100 mm and 95 mm. Results indicate that there is significant differences on head and consumed power between predicted value by simulation and predicted value obtained by employing affinity equations.

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“…Ramirez et al [ 49 ] used a design of experiment technique for the characterization and optimization phenomena in dredging centrifugal pumps. Various parameters such as swing speed, dredging depth and inclination and impeller rpm were analyzed.…”

Section: Investigation and Identification For Slurry Erosion And Cmentioning

confidence: 99%

Strive to Reduce Slurry Erosion and Cavitation in Pumps through Flow Modifications, Design Optimization and Some Other Techniques: Long Term Impact on Process Industry

et al. 2021

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Centrifugal pumps are being widely used in various industries for moving fluids that carry solids through pipelines where the need of head and flow rate is not high. Slurry erosion and cavitation are an extremely complex and not yet fully understood phenomenon that occur in centrifugal pumps; however, these undesirable phenomena can be reduced to a certain extent. Appropriate design and development of experiments is required to reasonably predict slurry erosion and cavitation. However, CFD methodology complements analytical solutions and experiments whenever testing of equipment has limitations. The current paper highlights the various slurry erosion and cavitation reduction techniques utilized by different researchers. Economic analysis conducted for a case study relevant to centrifugal pump (CP) usage in Pakistan shows that an 8% enhancement in pump efficiency can reduce the life cycle cost to about 17.6%, which could save up to USD 4281 for a single pump annually in Pakistan.

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CFD characterization and optimization of the cavitation phenomenon in dredging centrifugal pumps

Cited by 32 publications

References 34 publications

Numerical simulation of the influence of mixed sand on erosion characteristics of centrifugal pump

Numerical simulation of the influence of mixed sand on erosion characteristics of centrifugal pump

Analisis Kinerja Pompa Sentrifugal pada Variasi Trim Diameter Menggunakan Simulasi Numerik

Strive to Reduce Slurry Erosion and Cavitation in Pumps through Flow Modifications, Design Optimization and Some Other Techniques: Long Term Impact on Process Industry

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