Performance study based on inner flow field numerical simulation of magnetic drive pumps with different rotate speeds

Kong, Fanyu; Shen, Xiaokai; WenTing, Wang; Zhou, Sizhong

doi:10.3901/cjme.2012.01.137

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…However, owing to the low transmission efficiency of magnetic coupling, the efficiency of the magnetic drive pump is lower than that of ordinary centrifugal pumps. [1][2][3] Due to its high usage, the optimization of the magnetic drive pump and other turbomachinery is very important to reduce global energy consumption, and to increase their performance. [4][5][6][7][8][9] At present, optimization methods based on computational fluid dynamics (CFD) technology have been more often applied to enhance the performance of turbomachinery.…”

Section: Introductionmentioning

confidence: 99%

“…However, owing to the low transmission efficiency of magnetic coupling, the efficiency of the magnetic drive pump is lower than that of ordinary centrifugal pumps. 1–3 Due to its high usage, the optimization of the magnetic drive pump and other turbomachinery is very important to reduce global energy consumption, and to increase their performance. 4–9…”

Section: Introductionmentioning

confidence: 99%

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Optimization of the impeller for hydraulic performance improvement of a high-speed magnetic drive pump

Kong

Zhang

et al. 2022

Advances in Mechanical Engineering

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Magnetic drive centrifugal pumps have compact structure and lower efficiency than ordinary centrifugal pumps. The surrogate-based optimization technique was applied to improve the performance of a high-speed magnetic drive pump with the help of numerical simulations. Eight geometrical parameters of the impeller were considered as the design variable. About 290 samples of impeller were generated by optimal Latin hypercube sampling (OLHS) method, and the corresponding efficiencies of all the impeller samplings were obtained from numerical simulation. The performance test of the prototype pump was carried out, and the experimental results were in good agreement with the numerical simulation results. The hydraulic efficiency at 1.2 Qd of the magnetic drive pump was set as the optimization objective. Using response surface methodology (RSM), surrogate models were established for the objective functions based on the numerical results. The multi-island genetic algorithm (MIGA) was used to optimize the impeller. The hydraulic efficiency of the optimal impeller at rated flow rate was 72.89%, which was 6.23% higher than the prototype impeller.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of the impeller for hydraulic performance improvement of a high-speed magnetic drive pump

Kong

Zhang

et al. 2022

Advances in Mechanical Engineering

Self Cite

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“…With the characteristics of no leakage and compact structure, magnetic drive pumps are widely used in aerospace, chemical, pharmaceutical, and military industries [1][2][3][4]. The efficiency of magnetic drive pumps is usually lower than that of ordinary mechanical seal pumps.…”

Section: Introductionmentioning

confidence: 99%

Optimization Design of the Impeller Based on Orthogonal Test in an Ultra-Low Specific Speed Magnetic Drive Pump

et al. 2019

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To improve the hydraulic performance in an ultra-low specific speed magnetic drive pump, optimized design of impeller based on orthogonal test was carried out. Blades number Z, bias angle in peripheral direction of splitter blades θ s , inlet diameter of splitter blades D si , and deflection angle of splitter blades α were selected as the main factors in orthogonal test. The credibility of the numerical simulation was verified by prototype experiments. Two optimized impellers were designed through the analysis of orthogonal test data. The internal flow field, pressure fluctuation, and radial force were analyzed and compared between optimized impellers and original impeller. The results reveal that impeller 7 (Z = 5, θ s = 0.4θ, D si = 0.75D 2 , α = 0 • ) could increase the head and efficiency, compared to the original impeller, by 2.68% and 4.82%, respectively. Impeller 10 (Z = 5, θ s = 0.4θ, D si = 0.55D 2 , α = 0 • ) reduced the head by 0.33% and increased the efficiency by 8.24%. At design flow rate condition, the internal flow of impeller 10 was the most stable. Peak-to-peak values of pressure fluctuation at the volute tongues of impeller 7 and impeller 10 were smaller than those of the original impeller at different flow rate conditions (0.6 Q d , 1.0 Q d and 1.5 Q d ). Radial force distribution of impeller 10 was the most uniform, and the radial force variance of impeller 10 was the smallest.Energies 2019, 12, 4767 2 of 21 Shigemitsu T. et al. [10,11] improved the design of a small centrifugal pump in the form of adding splitter blades. It was found that the flow near the impeller outlet became uniform after the splitter blades were used, while the efficiency of the volute increased and the vortex loss decreased.Yuan [12][13][14] discussed the principle and results of adding splitter blades based on the real flow in centrifugal pumps, the analysis results indicated that the splitter blades that deviated toward the suction surface of ordinary blades improved pump head and efficiency, adding splitter blades in the impeller moved the high efficiency point of the pump to the direction of large flow rate, and adding splitter blades in a screw-type centrifugal pump could decrease the radial forces on the impeller, but also decrease oscillations in volute as well. The influence of blade number was not considered in the analysis.Zhang [15,16] investigated the influences of different positions of splitter blades on the performance of a centrifugal pump, two different splitter blade schemes were proposed: One located in the middle of the channel and the other having a deviation angle to the suction side of the long blade. The results showed that adding splitter blades can improve the tangential component distribution of absolute velocity at impeller outlet, and the streamline has a better consistency with the blades shape when splitter blades deviated to the long blade, which decreases energy loss.Gu [17] and Cui [18] studied the effects of splitter blades on the performance and internal flow of low specific speed ce...

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“…In this paper, taking the viscidity and turbulence into consideration and gasliquid two-phase flow as the object of study, the transmission equation considering the content of gaseous mass is given as follows [21][22][23][24]:…”

Section: Cavitation Modelmentioning

confidence: 99%

Research on Distribution of Flow Field and Simulation of Working Pulsation Based on Rotating-Sleeve Distributing-Flow System

Zhang

Yang

Zhao

et al. 2017

Modelling and Simulation in Engineering

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To solve problems of leakage, vibration, and noise caused by disorders of flow field distribution and working pulsation in the rotating-sleeve distributing-flow system, governing equations of plunger and rotating sleeve and computational fluid dynamics (CFD) model are developed through sliding mesh and dynamic mesh technology to simulate flow field and working pulsation. Simulation results show that the following issues exist: obviously periodic fluctuation and sharp corner in flow pulsation, backward flow when fluid is transformed between discharge and suction, and serious turbulence and large loss in kinetic energy around the damping groove in transitional movements. Pressure in the pump chamber rapidly rises to 2.2 MPa involving over 10% more than nominal pressure when the plunger is at the Top Dead Center (TDC) considering changes about damping groove's position and flow area in two transitional movements. Shortly pressure overshoot gradually decreases to a normal condition with increasing flow area. Similarly, pressure in the pump chamber instantaneously drops to a saturated vapor pressure −98.9 KPa when the plunger is at the Bottom Dead Center (BDC). With increasing flow area the overshoot gradually increases to the normal condition. This research provides foundations for investigating flow field characteristic and structure optimization of rotating-sleeve distributingflow system.

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Performance study based on inner flow field numerical simulation of magnetic drive pumps with different rotate speeds

Cited by 10 publications

References 8 publications

Optimization of the impeller for hydraulic performance improvement of a high-speed magnetic drive pump

Optimization of the impeller for hydraulic performance improvement of a high-speed magnetic drive pump

Optimization Design of the Impeller Based on Orthogonal Test in an Ultra-Low Specific Speed Magnetic Drive Pump

Research on Distribution of Flow Field and Simulation of Working Pulsation Based on Rotating-Sleeve Distributing-Flow System

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