Resonance risk assessment method on a storage pump’s centrifugal impeller by considering the hydrodynamic damping ratio

Zeng, Yi; Li, N.; Wang, C. Y.; Xiao, Ruofu; Wang, F. J.; Yao, Zhifeng

doi:10.1080/19942060.2022.2143902

Cited by 4 publications

(1 citation statement)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their findings indicate that increased spacing between rotor and stator reduces interaction intensity, resulting in decreased pressure pulsation.Cumpsty et al 12 numerically and experimentally examined diagonal flow fan tip clearance, revealing tip leakage vortex and subsequent eddy breakdown causing core disappearance. Zeng et al 13 employed reverse neural networks and genetic algorithms to enhance fan efficiency under diverse conditions.Yang et al 14 combined RBF and kriging models for axial fan optimization with NSGA-II, improving both flow rate and noise objectives. Zhou et al 15 utilized kriging agent models and NSGA-II to optimize axial fans, validated by experiments.…”

Section: Introductionmentioning

confidence: 99%

The multi-objective optimisation design of outlet guide vanes of diagonal flow fan based on sobol sensitivity analysis

Mao,

Luo,

Zhou

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

Diagonal flow fans offer substantial energy-saving potential and find broad application across various sectors. Their performance relies heavily on factors like outlet guide vanes and spacing relative to moving blades. However, research into enhancing fan performance through optimized guide vanes and spacing remains limited. In this study, we focus on improving the accuracy of predicting the internal flow field of diagonal flow fans. This paper incorporate rotation and curvature effects using the Large Eddy Simulation (LES) model and introduce stress terms with helicity constraints to create a non-linear subgrid-scale model. This refined model enables more precise numerical simulations. By employing accurate simulations, we optimize the outlet guide vane configuration and conduct sensitivity analysis. We utilize a Radial Basis Function (RBF) model coupled with the Sobol method for this purpose. The optimized guide vane design exhibits enhanced resistance to airflow separation compared to the original, resulting in notable reductions in flow losses within the grille channel. Experimental tests are performed on the diagonal flow fan both before and after optimization. At the specified operating point, the second guide vane optimization leads to a 1.28 m3/min increase in fan flow, a 4.33% rise in total pressure efficiency, and a 2.2 dB noise reduction. These findings underscore the accuracy of the helicity correction model in predicting diagonal flow fan behavior. The multi-objective optimization approach, combining the RBF proxy model with the Sobol method, proves highly reliable. It offers valuable design insights for similar fans and establishes a credible design methodology.

show abstract

Section: Introductionmentioning

confidence: 99%

The multi-objective optimisation design of outlet guide vanes of diagonal flow fan based on sobol sensitivity analysis

Mao,

Luo,

Zhou

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part A:

View full text Add to dashboard Cite

show abstract

Investigation on the dynamic behavior of cloud cavitation around a flexible hydrofoil

Liu,

Zhao,

Pan

et al. 2023

J Hydrodyn

View full text Add to dashboard Cite

Research on pressure pulsation characteristics of a pump-turbine in pump mode with rotating stall: Focus on the broadband frequency

Zeng,

Qian,

et al. 2024

Physics of Fluids

View full text Add to dashboard Cite

To investigate the adverse effects of rotating stalls on the pressure pulsation characteristics of a pump-turbine in pump mode, an unsteady numerical simulation was carried out by applying the partially averaged Navier–Stokes turbulence model. The numerical methods were carefully verified, and the onset flow rate of the hump at the performance curve and heads were in good agreement with the experimental data. The rotating stall appeared in the guide vane when the flow rate ranged from 0.514 to 0.887 times the best efficiency point (QBEP), with a frequency of 11.7% times the rotational frequency. In the period of a rotating stall, a sudden intensive pressure pulsation in the guide vane channel was observed and named as the component of the broadband frequency, and its corresponding flow mechanism was explained as the vortex evolution between the adjacent guide vane blades based on the dynamic mode decomposition technology. There were three distinct characteristics of broadband frequency: (i) intermittent occurrence when the rotating stall cell propagated to the current flow channel, (ii) a wide range of the frequency varying with flow rate, (iii) a considerable amplitude, e.g., reaching 21.1%–42.2% times that of the rotating stall frequency. In addition, both the frequency range and amplitude of the broadband frequency gradually decreased as the flow rate increased to 0.887QBEP. This study clarified the internal flow mechanism and frequency behaviors of a sudden intensive pressure pulsation if a rotating stall occurred, which was important to assess the stability of pump-turbine units.

show abstract

Resonance risk assessment method on a storage pump’s centrifugal impeller by considering the hydrodynamic damping ratio

Cited by 4 publications

References 29 publications

The multi-objective optimisation design of outlet guide vanes of diagonal flow fan based on sobol sensitivity analysis

The multi-objective optimisation design of outlet guide vanes of diagonal flow fan based on sobol sensitivity analysis

Investigation on the dynamic behavior of cloud cavitation around a flexible hydrofoil

Research on pressure pulsation characteristics of a pump-turbine in pump mode with rotating stall: Focus on the broadband frequency

Contact Info

Product

Resources

About