Visualizing test on the pass-through and collision characteristics of coarse particles in a double blade pump

Tan, Minggao; Lian, Yichao; Liu, Houlin; Wu, Xu; Ding, Rong

doi:10.1016/j.ijnaoe.2017.06.003

Cited by 9 publications

(7 citation statements)

References 7 publications

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“…At the same time, the performance tests of water, rapeseed, wheat, and soybean hydraulic transport were carried out on the vortex pump. Tan et al [15] used high-speed photography technology to track the motion law of single particles in the solid-liquid two-phase flow of coarse particles in a double-paddle pump and analyzed the influence of particle size and particle density on the passing and collision characteristics of particles. Wang et al [16] used experimental methods to study the effect of different coating thicknesses on the operating characteristics of sand-containing solid-liquid two-phase flow centrifugal pumps.…”

Section: Introductionmentioning

confidence: 99%

Study on Fiber Clogging Mechanism in Sewage Pump Based on CFD–DEM Simulation

et al. 2022

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A large number of solid particles and fibrous impurities are always entrained in the fluid transported by a sewage pump, which can easily lead to the blockage of the sewage pump. In view of this, CFD–DEM simulations were conducted in this paper to reveal the fiber clogging mechanism in the sewage pump. A CFD–DEM coupling method with a fiber model was established and verified by an experimental benchmark, i.e., the rectangular flow channel. The method was then applied to a model sewage pump to, after mesh independence tests, analyze the effects of flow rate and fiber length on fiber motion and clogging. The results showed that the position of fiber retention coincides with the position of the vortex, mainly located at the inlet of the impeller, the head of the blade, the middle of the blade, and the tongue in the pump. In the case of a low flow rate, the fiber was more likely to cause blockage in the head of the blade, and in the case of a large flow rate, the fiber would wind around the tongue in the pump. At the same flow rate, long fiber was more likely to stay on the blade’s suction surface.

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Section: Introductionmentioning

confidence: 99%

Study on Fiber Clogging Mechanism in Sewage Pump Based on CFD–DEM Simulation

et al. 2022

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“…Double-blade centrifugal pumps are widely used to transport liquids containing solid particles, for instance, wastewater treatment, chemical process and liquid food transportation. The impeller with two blades can be capable of handling the liquids with large solid particles or long fibers, due to its larger flow passages [1]. However, compared with multiblade centrifugal pump, the internal flow instability of the double-blade centrifugal pump is more serious, and the corresponding slip is increased, because the flow control capability of the impeller is decreased due to its large passage.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Instability Analysis of a Double-Blade Centrifugal Pump

Yao

Lin³

et al. 2021

Applied Sciences

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The flow instability of a double-blade centrifugal pump is more serious due to its special design feature with two blades and large flow passages. The dynamic instabilities and pressure pulsations can affect the pump performance and operating lifetime. In the present study, a numerical investigation of unsteady flow and time variation of pressure within a complete double-blade centrifugal pump was carried out. The time domain and frequency domain of pressure pulsations were extracted at 16 monitoring locations covering the important regions to analyze the internal flow instabilities of the pump model. The frequency spectra of pressure pulsations were decomposed into Strouhal number dependent functions. This led to the conclusion that the blade passing frequency (BPF) related vibrations are exclusively flow-induced. Large vortices were observed in the flow passages of the pump at low flow rate. It is noted that high vorticity magnitude occurred in the vicinities of the blade trailing edge and tongue of the volute, due to the rotor-stator interaction between impeller and volute.

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“…Tan et al [18] used the high-speed photography technique to track the movement rule of a single particle of the coarse particle solid-liquid two-phase flow in a double-blade slurry pump and analyzed the influences of particle diameter and particle density on the pass-through and collision characteristics of particles. Mehta et al [19] used PIV technology to study the velocity variation of solid-phase particles in the impeller of slurry pump, indicating that the maximum velocity of the particles was distributed in the suction surface of the blades and their trailing edges. Shi et al [20,21] proposed a phase discrimination method for the two-phase PIV images, a modified adaptive cross-correlation to process the two-phase images, and designed a new experimental facility without agitation for internal solid-liquid two-phase flow test in a centrifugal pump by PIV.…”

Section: Introductionmentioning

confidence: 99%

Research on the Deposition Characteristics of Integrated Prefabricated Pumping Station

Wang

Liu

et al. 2020

Symmetry

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Based on the discrete phase model (DPM) solid–liquid two-phase flow model and MATLAB image processing technology, an integrated prefabricated pumping station was taken as the research object to study deposition characteristics under different flow rates, different particle diameters, and different liquid levels. Considering the incomplete symmetry of the internal flow of the prefabricated pumping station, deposition characteristics of the prefabricated pumping station under single/double pumps were also analyzed. Double pumps were symmetrically distributed in the integrated prefabricated pump station, and the movement trajectories of particles at the bottom of the pump pit under the closing inlet valve were measured through the use of a high-speed photography experiment. Results showed that with the increase of the flow rate, the deposition rate of the separated prefabricated pumping station decreased. With an increase of the particle diameter, the movement of particles was farther away from the vertical barrier weir. In the range of particle diameter of 6 to 10 mm, the deposition rate decreased with the increase of the particle diameter. With the increase of the liquid level, the deposition rate decreased, first, and then increased again. In the case of the single pump operation, the deposition rate of the right pump operation was smaller than that of the left pump operation. The variation of the deposition rate when the right pump operated was basically the same as that when the dual pumps operated. The movement path of particle N1 was longer. With the decrease of the flow rate and the increase of the particle diameter, the following feature of the particle decreased, and it was easier to impact the walls and edges, which caused long-term deposition. The research results could provide some suggestions for the design of anti-deposition performance of prefabricated pumping station.

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Visualizing test on the pass-through and collision characteristics of coarse particles in a double blade pump

Cited by 9 publications

References 7 publications

Study on Fiber Clogging Mechanism in Sewage Pump Based on CFD–DEM Simulation

Study on Fiber Clogging Mechanism in Sewage Pump Based on CFD–DEM Simulation

Dynamic Instability Analysis of a Double-Blade Centrifugal Pump

Research on the Deposition Characteristics of Integrated Prefabricated Pumping Station

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