Multistage pump axial force control and hydraulic performance optimization based on response surface methodology

Chen, Qian; Luo, Xin; Yang, Congxin; Wang, Bin

doi:10.1007/s40430-021-02849-1

Cited by 8 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, a series of studies on impeller failure are carry out. Qian et al [6 ] established a multivariate regression theoretical model of impeller parameters and multistage pumps to study hydraulic performance and axial force; Li et al [7] studied the eccentric rotor's influence on the excitation force of the sealing ring of the nuclear main pump; Zhou et al [8] investigated the influence of different pump flow parameters on the fluid-induced-force of the impeller; Chen et al [9] analyzed the effect of impeller wear ring clearance on the hydraulic of pumps.…”

Section: Introductionmentioning

confidence: 99%

The effect of the impeller eccentricity on the hydrodynamic characteristics of a centrifugal pump

Fancheng,

Ni,

Liu

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

To explore the effect of impeller eccentricity caused by shaft parallel misalignment on the hydrodynamic characteristics of a centrifugal pump, a numerical simulation model based on computational fluid dynamics (CFD) is established. The SST k-ω turbulence model is used to describe the flow field in centrifugal pump. The eccentric motion of the impeller is described by the sliding mesh method (SMM). The results indicates that the nonuniformity and instability of flow field will be aggravated with the increment of impeller eccentricity, which then reduce the pump head and efficiency to a certain extent. The radial force exerted on the impeller is directly proportional to the eccentricity of the impeller. In addition, the impeller eccentricity has a significant impact on the peak rotation frequency of shaft frequency. This study can provide a numerical reference for eccentricity fault diagnosis and vibration control of centrifugal pump impellers to carry out optimal design and vibration reduction.

show abstract

Section: Introductionmentioning

confidence: 99%

The effect of the impeller eccentricity on the hydrodynamic characteristics of a centrifugal pump

Fancheng,

Ni,

Liu

2024

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

show abstract

“…Under the variable speed conditions, when the rotational speed changed from high to low, the axial force direction exhibited a shift from a positive to a negative orientation. Qian et al [19], with the aim to optimize the impeller blade parameters in multistage pumps, established a multivariate regression model. Optimum parameter combinations were obtained, taking into consideration the pump performance and axial force.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Non-Uniform Inflow Effects on Impeller Forces in Axial-Flow Pumps Operating as Turbines

Kan,

Zhang,

et al. 2024

Water

View full text Add to dashboard Cite

Due to the existence of an inlet elbow, transmission shaft, and other structural components, the inflow of axial-flow pumps as turbines (PATs) becomes non-uniform, resulting in the complexity of internal flow and adverse effects such as structural vibration. In this paper, numerical methods were employed to explore the non-uniform inflow effects on impeller forces and internal flow field characteristics within an axial-flow PAT. The study results indicated that non-uniform inflow caused uneven pressure distribution inside the impeller, which leads to an imbalance in radial forces and offsetting the center of radial forces. With an increasing flow rate, the asymmetry of radial forces as well as the amplitude of their fluctuations increased. Non-uniform inflow was found to induce unstable flow structures inside the impeller, leading to low-frequency, high-amplitude pressure fluctuations near the hub. Using the enstrophy transport equation, it was shown that the relative vortex generation term played a major part in the spatiotemporal evolution of vortices, with minimal viscous effects.

show abstract

“…Recently, the axial force plays a critical role in measuring operation stability in the design and operation of centrifugal pumps, which has been studied by lots of experts and scholars [1][2][3][4]. Inaccurate calculation of axial force will cause problems such as shaft seal damage and bearing fracture, thereby reducing the operational stability of the multistage pump.…”

Section: Introductionmentioning

confidence: 99%

Numerical calculation and analysis of axial force of multistage centrifugal submersible pump

Dong

Liang

Dong

2022

J. Phys.: Conf. Ser.

View full text Add to dashboard Cite

The study of axial force has been a hot spot in fluid mechanics research, and the magnitude of axial force directly affects the stability, safety, and efficiency of submersible pumps. This paper takes 200QJ50 multistage centrifugal submersible pump with spatial guide vane as the research object, simulates and numerically calculates the internal flow field of multistage submersible pump based on Standard k-ε turbulence model, a SIMPLE algorithm, and high-resolution format through CFX software, analyzes the distribution law of static pressure and velocity field of the multistage submersible pump under 0.7Qd , 0.8Qd , 0.9Qd , 1.0Qd and 1.1Qd working conditions and compared the theoretical and simulated values of the corresponding axial force for each working condition. The results show that with the increase of the flow rate, the axial force of the multistage submersible pump shows a downward trend; the axial force generated by the first stage impeller has a larger proportion, and reaches the maximum value in the design condition; the traditional axial force calculation formula can more accurately predict the axial force under the design condition, and the error is 6%. The results of this study can provide references for the design and optimization of multistage centrifugal submersible pumps.

show abstract

Multistage pump axial force control and hydraulic performance optimization based on response surface methodology

Cited by 8 publications

References 13 publications

The effect of the impeller eccentricity on the hydrodynamic characteristics of a centrifugal pump

The effect of the impeller eccentricity on the hydrodynamic characteristics of a centrifugal pump

Investigation of Non-Uniform Inflow Effects on Impeller Forces in Axial-Flow Pumps Operating as Turbines

Numerical calculation and analysis of axial force of multistage centrifugal submersible pump

Contact Info

Product

Resources

About