Effects of the Impeller Blade with a Slot Structure on the Centrifugal Pump Performance

Wang, Hongliang; Bing, Long; Wang, Chuan; Chen, Han; Li, Linjian

doi:10.3390/en13071628

Cited by 58 publications

(47 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the rapid development of computational fluid dynamics (CFD) technology, many scholars have applied CFD to solve complex problems encountered in engineering such as turbomachinery [10][11][12][13][14]. At the same time, some scholars have conducted a lot of research on vertical submerged impinging water jets through CFD.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

et al. 2020

Self Cite

View full text Add to dashboard Cite

As a kind of water jet technology with strong impinging force and simple structure, the submerged impinging water jet can produce strong scouring action on subaqueous sediments. In order to investigate the flow field characteristics and impinging pressure of submerged impinging water jets at different impinging heights, the Wray-Agarwal (W-A) turbulence model is used for calculation. The velocity distribution and flow field structure at different impinging heights (1 ≤ H/D ≤ 8), and the impinging pressure distribution at the impingement plate under different Reynolds numbers (11, 700 ≤ Re ≤ 35100) are studied. The results show that with the increase of the impinging height, the diffusion degree increases and the velocity decreases gradually when the jet reaches the impingement region. The fluid accelerates first and then decelerates near the stagnation point. The maximum impinging pressure and the impinging pressure coefficient decrease with the increase of the impinging height, but the effective impinging pressure range remains unchanged. In this paper, the distribution characteristics of the impinging pressure in the region of the impingement plate at different heights are clarified, which provides theoretical support for the prediction method of the impinging pressure.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The model pump [22] was a single-stage single-suction volute centrifugal pump with a specific speed n s of 85. The main design parameters of the centrifugal pump are shown in Table 1.…”

Section: Geometric Modelmentioning

confidence: 99%

Numerical Calculation of Energy Performance and Transient Characteristics of Centrifugal Pump under Gas-Liquid Two-Phase Condition

Zhou

Han

et al. 2020

Micromachines

View full text Add to dashboard Cite

The unstable operation of a centrifugal pump under the gas-liquid two-phase condition seriously affects its performance and reliability. In order to study the gas phase distribution and the unsteady force in an impeller, based on the Euler-Euler heterogeneous flow model, the steady and unsteady numerical calculations of the gas-liquid two-phase full flow field in a centrifugal pump was carried out, and the simulation results were compared with the test data. The results show that the test results are in good agreement with the simulation data, which proves the accuracy of the numerical calculation method. The energy performance curve of the model pump decreases with the increase of the gas content, which illustrates a serious impact on the performance under the part-load operating condition. The results reveal that the high-efficiency-operating range become narrow, as the gas content increases. The gas phase is mainly distributed on the suction surface of the impeller blades. When the gas content reaches a certain value, the gas phase separation occurs. As the inlet gas content increases, the radial force on the impeller blades decreases. The pattern of the pressure pulsation is similar to that under pure water and low gas content conditions, and the number of peaks during the pulsation is equal to the number of the impeller blades. After the gas content reaches a certain value, the pressure fluctuates disorderly and the magnitude and the direction of radial force change frequently, which are detrimental to the operation stability of the pump. The intensity of the pressure pulsations in the impeller flow channel continues to increase in the direction of the flow under pure water conditions. The pressure pulsation intensities at the blade inlet and the volute tongue become more severe with the increase of the gas content.

show abstract

“…Mixed flow pumps have several advantages for pico-hydropower plant compared to purpose-made turbines. Mixed flow pumps have availability in a large number of standard sizes for a wide range of heads and flows, short delivery time, long life span, and easy installation and availability of spare parts such as seals [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Effect of Rotational Speed on Performance of Mixed Flow Pump as Turbine

Chen

Taguchi

Yang

2021

Shock and Vibration

View full text Add to dashboard Cite

In order to research the flow characteristics of mixed flow pump as turbine (MF-PAT) with different rotation speeds, a hydraulic model of mixed flow pump was established based on a pumped storage power station. The k-ε turbulent model was used to simulate internal flow fields with three rotation speeds by SMPLEC algorithms. Subsequently, theoretical calculations and experiments were carried out to verify the precision of numerical simulation. The results showed that the rotation speed of MF-PAT has a significant impact on its performance. Both numerical calculations and experimental test presented that all efficiency curves consist of ascending and descending stages, while the shaft power and head increase nonlinearly from 1000 to 2000 r/min. When the MF-PAT deviates from the rated environment, increase in speed is positive to the energy recovery efficiency in the high water period and negative in the dry season. This work could provide a reference for further study of MF-PAT.

show abstract

Effects of the Impeller Blade with a Slot Structure on the Centrifugal Pump Performance

Cited by 58 publications

References 12 publications

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

Numerical Study of the Normal Impinging Water Jet at Different Impinging Height, Based on Wray–Agarwal Turbulence Model

Numerical Calculation of Energy Performance and Transient Characteristics of Centrifugal Pump under Gas-Liquid Two-Phase Condition

Effect of Rotational Speed on Performance of Mixed Flow Pump as Turbine

Contact Info

Product

Resources

About