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Special Issue Editors

Special Issue Information

Dear Colleagues,

Pumping and hydropower systems are important pieces of equipment in the area of engineering, energy, water resources, and the chemical industry. Modeling complex flows is a major challenge in understanding the mechanism of liquid transport and energy conversion. Pumping and hydropower systems are complicated hydraulic systems. The design, operation, and maintenance of pumping and hydropower systems are based on the calculation and analysis of the hydraulic transient. The scientific outcomes from pumping and hydropower systems can help support engineers and decision makers in evaluating the energy performance and in implementing measures aiming to increase the operating efficiency and reliability. The research achievements provide a basis and guidance for the safe, stable, and efficient operation of pumping and hydropower systems.

The aim of this Special Issue is to provide an overview of these new challenges arising from a wide range of pumping and hydropower systems, including the design method, optimization, numerical simulation, turbulence modelling, etc. The topics will concern new findings and developments for a phenomenon mechanism analysis and/or engineering design guidance through a numerical simulation or experiments for pumping and hydropower systems.

Dr. Ling Zhou
Dr. Wencheng Guo
Guest Editors

Manuscript Submission Information

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Keywords

pumps
turbines
hydropower
numerical simulation
experiments
vibration
hydraulic forces
hydraulic transient
stability
control strategy

Published Papers (2 papers)

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Research

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16 pages, 10841 KiB

Open AccessArticle

Numerical Simulation of a Three-Stage Electrical Submersible Pump under Stall Conditions

by Yuqiang Wang, Zhe Wang, Xiangyu Song, Ling Bai, Mahmoud A. El-Emam and Ling Zhou

Water 2023, 15(14), 2619; https://doi.org/10.3390/w15142619 - 19 Jul 2023

Viewed by 1133

Abstract

This paper focuses on investigating the stall phenomenon of a three-stage electrical submersible pump using numerical methods by examining the internal and external characteristics of the pump under design conditions and critical stall and deep stall conditions. The energy losses inside the impeller and diffuser are also discussed. The internal flow at all pump stages under stall conditions is analyzed, highlighting differences and correlations. Under critical stall conditions, multiple vortices appear in the impeller channel of the first stage, while the flow in the secondary and final impeller remains smooth. Flow separation occurs in the diffusers at all three stages. Under deep stall conditions, the inlet setting angle causes all stages to enter a synchronous stall state. The range and intensity of vortices in the diffusers of all stages are further increased, seriously affecting the mainstream. This paper provides valuable insights for the research of internal flow and optimal design of electrical submersible pumps. Full article

(This article belongs to the Special Issue Hydrodynamics in Pumping and Hydropower Systems)

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Review

Jump to: Research

19 pages, 1782 KiB

Open AccessReview

Application of the 3D Inverse Design Method in Reversible Pump Turbines and Francis Turbines

by Giacomo Zanetti, Monica Siviero, Giovanna Cavazzini and Alberto Santolin

Water 2023, 15(12), 2271; https://doi.org/10.3390/w15122271 - 17 Jun 2023

Cited by 1 | Viewed by 1609

Abstract

The increasingly stringent requirements in terms of flexibility and efficiency for hydraulic turbines pose new challenges for designers. Although computational fluid dynamics has offered new opportunities to significantly improve the performance in the preliminary design phase, the design of a hydraulic turbine still represents a challenging task requiring considerable engineering input and know-how. In such a scenario, the inverse three-dimensional design strategy has recently demonstrated its effectiveness in improving the machine performance, and interesting applications have been proposed for Francis turbines and reversible pump turbines. This paper presents and discusses the most interesting design solutions so far documented. The influence of blade staking and load distribution on the hydrodynamic performance is discussed. Finally, optimized blade load distributions are reported to provide useful design guidelines for the development of the new generation of hydraulic turbines. Full article

(This article belongs to the Special Issue Hydrodynamics in Pumping and Hydropower Systems)

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