Numerical Investigation of the FSI Characteristics in a Tubular Pump

Wang, Shuo; Zhang, Liaojun; Yin, Guojiang

doi:10.1155/2017/7897614

Cited by 11 publications

(8 citation statements)

References 18 publications

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“…In addition, several studies focused on improving and optimizing the pump performance for different pumps such as reactor coolant pumps, multiphase pumps, centrifugal pumps and pulp pumps, by using the orthogonal optimization method. [22][23][24][25] However, there were many researches [26][27][28] in addition to the above researches about tubular pumps, previous studies focused mainly on traditional tubular pumps with an operating head less than 5 m, and only a few studies regarding the performance of tubular pumps with an operating head more than 5 m have been reported. With the extensive construction of long-distance water transfer projects, new challenging requirements for tubular pumps are being proposed, such as high operating head, high efficiency and low shaft power.…”

Section: Introductionmentioning

confidence: 99%

“…However, there were many researches 26–28 in addition to the above researches about tubular pumps, previous studies focused mainly on traditional tubular pumps with an operating head less than 5 m, and only a few studies regarding the performance of tubular pumps with an operating head more than 5 m have been reported. With the extensive construction of long-distance water transfer projects, new challenging requirements for tubular pumps are being proposed, such as high operating head, high efficiency and low shaft power.…”

Section: Introductionmentioning

confidence: 99%

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Multiobjective optimization of a tubular pump to improve the applicable operating head and hydraulic performance

Zhao

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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Tubular pumps are widely used in irrigation and water conveyance projects. However, the operating head of most of these pumps is low, and only a few studies have focused on the design of an efficient tubular pump with a head more than 5 m, which is common in long-distance water supply projects. This work aims to improve the operating head and efficiency of tubular pumps while maintaining a low shaft power. The multi-objective orthogonal optimization method was used to determine the critical parameters of the tubular pump, i.e., blade number, airfoil, blade thickness and guide vane distance, and nine design schemes were selected. Next, by using computational fluid dynamics (CFD), a 3D model of the tubular pumps under different schemes was established, and the results were compared. Subsequently, the range method and weighted matrix method were utilized to find the optimized scheme. In addition, an experimental investigation was performed to verify the simulation and the performance of the designed tubular pump. The results indicated that the optimized scheme improved the operating head to 6.9 m with higher efficiency of 84.2% and a lower shaft power of 27.7 kW. The modeling results were in agreement with the experimental measurements, and the designed tubular pump had a wide range of high-efficiency zones.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiobjective optimization of a tubular pump to improve the applicable operating head and hydraulic performance

Zhao

Zhang

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Wu et al 22 analyzed the pressure pulsation in a centrifugal pump by SST k-ω model, which has accurate results. Wang et al 23 analyzed the pressure pulsation in a tubular pump by SST k-ω model. Therefore, CFD has become a mature technology for analyzing pressure pulsation.…”

Section: Introductionmentioning

confidence: 99%

Influence of eccentric impeller on pressure pulsation of large-scale vaned-voluted centrifugal pump

Tao

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Large-scale vaned-voluted centrifugal pump is a key component in water conveyance engineering. Hydraulic performance and pressure pulsation are important assessment indicators for operation efficiency and stability. During the common operation, the impeller eccentricity is easy to occur due to installation error, radial force and other reasons, which results the changes of hydraulic performance and pressure pulsation. In this study, the hydraulic performance and pressure pulsation in the vaneless region are analyzed by computational fluid dynamics method. The influence of eccentric impeller on the hydraulic performance in each components and the pressure pulsation is studied. Results show that the eccentric impeller causes the increasing of hydraulic dissipation especially in the volute. However, decreasing of the hydraulic dissipation happens in the draft tube. Impeller eccentricity significantly enhances the amplitude of rotation frequency, but has no obvious effect on the blade passing frequency and its harmonics. The peak-peak value of pressure pulsation of eccentric impeller increases rapidly with the eccentricity ratio. The results of this study provide scientific support for solving the stability problem caused by eccentric impeller in engineering cases.

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“…Negru and Muntean 24 used a one-way fluid-structure interaction method to obtain the stress distribution of the pressure and suction surfaces of a Francis runner blade. Wang et al 25 used a tubular turbine as an example to analyze the stress concentration at the connection between the leading edge of the blade and hub. Müller et al 26 used fluid dynamics and finite element analysis to evaluate hydraulic pump-turbines and showed that the external excitation frequency is much lower than the modal vibration frequency of the runner, which does not cause resonance.…”

Section: Introductionmentioning

confidence: 99%

Investigation on runner resonance and fatigue life of a high–head pump–turbine

Duan

Ning

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The structural stability and fatigue of the runner of a high-head pump-turbine was explored by conducting a numerical simulation of the entire flow passage under different working conditions. A two-way fluid-structure interaction calculation method was used, which captured the values for 5.75 fn, 9 fn, 13 fn, 18 fn, and 20 fn ( fn is rotational frequency) in pressure fluctuation. The resonance of the runner was compared with the results of the modal analysis. The rain flow and damage accumulation methods were used to predict the fatigue life. The study found that the 13 fn pressure fluctuation of the fluid in the flow passage of the pump-turbine is the primary cause of the resonance of the runner blade. The main frequency of vibration is the third natural frequency of the runner. The vibration form is up and down along the Z–axis, and there are some high-order resonances. The most vulnerable part of the entire runner is located at the T-shaped connection between the blade inlet edge and the runner crown and bottom ring. The excitation force under the small flow condition is more complicated than that under the large flow condition, which is more likely to cause fatigue damage to the runner. In addition, the damage extent of the high-stress amplitude to the runner is obviously greater than the influence of the number of stress cycles, accounting for approximately 60% of the total damage. The research results can provide a reference for the operational stability and life prediction of a high-head pump-turbine runner.

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Numerical Investigation of the FSI Characteristics in a Tubular Pump

Cited by 11 publications

References 18 publications

Multiobjective optimization of a tubular pump to improve the applicable operating head and hydraulic performance

Multiobjective optimization of a tubular pump to improve the applicable operating head and hydraulic performance

Influence of eccentric impeller on pressure pulsation of large-scale vaned-voluted centrifugal pump

Investigation on runner resonance and fatigue life of a high–head pump–turbine

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