Influence of the Volute Tongue Shape on Cavitation Performance in Aviation Fuel Centrifugal Pump

Zhao, Siwei; Li, Yiming; Zhang, Ling; Wang, Kai; Luo, Guangzhao

doi:10.1155/2023/7189771

Cited by 3 publications

(1 citation statement)

References 13 publications

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“…Fatigue fracture of large dredge pump shafts frequently occurs in engineering, but little research has been conducted on this problem. In view of the suggestion that a scientifically designed double volute can reduce the hydraulic radial force (Shi et al 2013;Kim et al 2016;Cui et al 2018;Yuan et al 2019;Zhang 2022), it would be interesting to investigate the characteristics of the corresponding total radial load and discuss the effect of the double volute in depth.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis on the Unsteady Radial Load on the Shaft of a Large-Scale Dredge Pump Unit

2023

JAFM

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Vibration and fatigue damage of pump shafts has become a prominent engineering problem, indicating the need for higher-quality reliability analysis of the pump unit in the design stage. In this study, the unsteady flow field in a large centrifugal dredge pump was numerically simulated via the unsteady Reynolds-averaged Navier-Stokes (URANS) method with the SST k-ω model. An experiment was carried out to verify the numerical method. The hydraulic radial force on the impeller and the total radial load were calculated based on computational fluid dynamics. The flow field with a double volute was simulated, analyzed, and compared to the flow field with a single volute. The stress of the pump shaft caused by the radial load was also calculated and discussed. The results show that the impeller gravity determines the time-averaged value and fluctuation frequency of the total radial load on the shaft, which must be considered in the shaft stability analysis. The total radial load fluctuating in asymmetric cycle results in stress cycles with different features at different circumferential locations. The application of a double volute effectively reduces the radial load on the pump shaft, which decreases the time-averaged hydraulic radial force by 38% and its fluctuation amplitude by 3%, decreases the time-averaged total radial load by 20% and its fluctuation amplitude by 28% in the design condition, and decreases the local stress at the narrowest shaft section by 44%. A double volute can be applied to weaken vibration and fatigue damage for a pump shaft if it is acceptable for the pump efficiency to be lowered.

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Section: Introductionmentioning

confidence: 99%

Numerical Analysis on the Unsteady Radial Load on the Shaft of a Large-Scale Dredge Pump Unit

2023

JAFM

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Investigation of cavitation characteristics in an aircraft centrifugal fuel pump

Liu,

Qi,

Zhu

et al. 2024

Flow Measurement and Instrumentation

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Research on uncertainties in fuel centrifugal pump based on prediction and reconstruction of internal flow field

Liu,

Zhong,

Zheng

et al. 2024

Physics of Fluids

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Geometric machining errors in the blade profile and variable operating conditions in the extreme operating environment are primary factors leading to the uncertainties in pump performance. This paper presents an analysis of uncertainties of fuel centrifugal pumps by modeling the geometry uncertainty in blade machining based on the Karhunen–Loève (KL) expansion and using a polynomial chaos expansion (PCE) model. First, the geometric uncertainty in the blade machining is described by the KL expansion in three sections and a stochastic simulation of the blade geometry is performed. Then, a PCE surrogate model is trained based on the least angle regression method and validated by the bootstrap method to quantify the uncertainties of performance indices. Finally, the influence mechanism and relative importance of each input uncertainty parameter are investigated using a quasi-Monte Carlo simulation method. The results show that the KL expansion of the blade profile uses the random vector perturbation superposition of three stream surface, achieving the dimensional reduction in the blade machining error. The PCE surrogate model, trained with a dataset of 3 × 106 sample points, exhibits excellent fit, and the R-squared and adjusted R-squared for head coefficient and efficiency are both above 80%. The variance of parameter control points of the reconstructed flow field is less than 0.002. The uncertainties in both operating conditions and parameters have an influence on the distribution of the global flow field, while the influence of the uncertainty in machining error on the global flow field mainly concentrates on the power-generating positions of the blade.

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Influence of the Volute Tongue Shape on Cavitation Performance in Aviation Fuel Centrifugal Pump

Cited by 3 publications

References 13 publications

Numerical Analysis on the Unsteady Radial Load on the Shaft of a Large-Scale Dredge Pump Unit

Numerical Analysis on the Unsteady Radial Load on the Shaft of a Large-Scale Dredge Pump Unit

Investigation of cavitation characteristics in an aircraft centrifugal fuel pump

Research on uncertainties in fuel centrifugal pump based on prediction and reconstruction of internal flow field

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