Analysis and Optimization of Unsteady Flow in a Double-Suction Centrifugal Pump for a Cooling-Water Supply System in a Nuclear Reactor

Yan, Hao; Su, Xiaozhen; Shi, Hongda; Cheng, Maosheng; Li, Yunqing

doi:10.1007/s11630-020-1252-z

Cited by 7 publications

(2 citation statements)

References 18 publications

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“…Kaupert K A [27] conducted an experimental study on the dynamic characteristics of a double volute high specific speed centrifugal pump, measured and summarized the characteristics of pressure fluctuations in the pump during operation. Yan H [28] and Yan P [29] et al conducted numerical simulation studies on centrifugal pumps with different specific speeds for the double volute design, and revealed that the double volute design affects the velocity field, pressure field and radial force influence. Al-Qutub A [30] et al explored the influence of the radial clearance between the impeller and the volute by experiments, and discussed the influence of the rotor-stator interaction on the pressure pulsation and vibration inside the centrifugal pump.…”

Section: Introductionmentioning

confidence: 99%

Investigation of radial force in a high-speed miniature pump

Song,

Zheng,

Luo

2024

J. Phys.: Conf. Ser.

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A high-speed miniature pump design is put forth for utilization in the aerospace sector, where the pump’s reliability holds critical importance under microgravity operational conditions. This study focuses on a dynamic bearing-equipped miniature centrifugal pump, chosen for its suitability in investigating radial forces. The prototype of the miniature pump is manufactured and tested by experiments at the rotational speed of 10,000r/min. A good agreement is observed between the numerical predictions and the experimental results. The radial force acting on different blade part has been analyzed for several flow rate conditions using the steady state CFD calculation. It has been found that the radial force exerted on the blade trailing edge exit is the main cause of the total radial force for the impeller. Moreover, using the unsteady CFD simulation, the evolution process of the radial force changing for both the direction and the magnitude with respect to the annular position due to the shaft rotation is discussed in details. The pressure pulsation is also monitored in impeller and volute casing. The results show that the amplitude of the unsteady radial force has a strong relationship with the time it takes for the blade trailing edge exit passing the volute tongue region, while the direction of the radial force hardly changes. The findings of this study contribute to facilitating the broader implementation of the high-speed miniature pump across diverse sectors of society.

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Section: Introductionmentioning

confidence: 99%

Investigation of radial force in a high-speed miniature pump

Song,

Zheng,

Luo

2024

J. Phys.: Conf. Ser.

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“…Zhao et al [6] used the methods of uniform experimental design, BP neural network, and fluid structure coupling calculation to optimize the volute of a double channel pump, and reduced reflux phenomenon at the volute tongue. Yang et al [7] optimized the throat height of the volute of the centrifugal pump and the placement angle of the volute tongue using the orthogonal test method. Huang et al [8] optimized the circumferential position angle of the cross flow fan using genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Study on the volute optimization and mechanism of vortex loss reduction for a centrifugal fan

Wang,

et al. 2024

J. Phys.: Conf. Ser.

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In order to reduce the flow loss in the volute and improve the efficiency of the centrifugal fan further, a new type volute with a diffusion profile was designed and optimized. The effects of diffusion angles were clarified by using numerical simulations and the method of design of experiment. The mechanism of vortex loss reduction of the diffusion-type volute was revealed. The results show that diffusion-type volute can reduce the flow loss in the volute by 30.8% compared with the original volute, and increase the efficiency of the fan by 2.24%. Parametric studies show that the diffusion angle of front disc has a great influence on the efficiency of the fan, and the effect of diffusion angle of rear disc is relatively less. Mechanism analysis shows that the diffusion-type volute can greatly reduce the vortex strength in the volute, especially eliminate the high-intensity vortex near the volute tongue. As a result, the volute loss is remarkably reduced. In addition, the diffusion-type volute can effectively reduce the amplitude of pressure fluctuation in terms of shaft frequency, characteristic frequency and broadband signals in the volute.

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