Author

Zhengwei Wang

5 papers indexed here

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Open access Oct 2026

Full-3D Compressible Pressure Pulsations Analysis of a Huge Francis-Type Pump-Turbine Unit Coupled with Its Water Conveyance System: Modeling Implications for Flexible Hydropower Operation

The growing demand for flexible hydropower operation requires a clearer understanding of pressure pulsations generated within hydraulic units and their connected water conveyance systems. A full three-dimensional (3D), weakly compressible computational fluid dynamics model coupling a prototype-scale ultra-high-head pum...

Zhi-Xing Li, Xing-Xing Huang, Wei-Yi Kong et al. · Machines · 0 citations

Open access Sep 2026

Effects of Hub Ratio on the Energy and Cavitation Performance of a Bulb Turbine

The hub ratio of a bulb turbine has an important influence on the unit’s flow capacity, efficiency, and operating stability and is one of the key parameters governing the hydraulic performance and structural safety of the turbine. To select the optimal hub ratio matching the bulb turbine of a hydropower station after l...

Zheng-Peng Wei, Yang Liu, Zheng-Wei Wang et al. · Energies · 0 citations

Open access Sep 2026

Geometric Improvement of High-Pressure Bifurcated Pipes for Enhanced Flow and Energy Characteristics Under Hydraulic Short-Circuit Operation

Hydraulic short-circuit (HSC) operation is an important approach to enhancing the operational flexibility of pumped-storage power plants (PSPPs). However, under this new operating mode, the flow characteristics in the bifurcated pipe deteriorate significantly, posing a threat to the efficiency of the piping system and...

Shan Zhu, M. Xia, Shi-Zhe Liu et al. · Machines · 0 citations

Review Open access Jul 2026

Pump Turbines Under Near-Zero Flow Conditions: A Review of Flow Instabilities, Guide Vane Dynamics, and Mitigation Strategies

The grid volatility caused by the integration of wind and solar power poses challenges to power systems, where Pumped Storage Hydropower (PSH) plays an irreplaceable role. During start-up, shutdown, and mode transition of pump turbines, near-zero flow conditions frequently occur, leading to severe hydraulic instability...

Hui Zeng, Yuhao Yan, Bin Wang et al. · Machines · 0 citations

Open access Jul 2026

Research on Pressure Fluctuation and Vortex Evolution Characteristics in Pump-Turbine Under Load-Rejection Condition

During load rejection in pumped-storage power stations, the rotational speed of the pump-turbine increases abruptly. The consequent structural deterioration of the internal flow induces high-amplitude hydraulic excitations, posing a serious threat to the operational stability of the unit. This study investigates a Fran...

Lei Deng, Wenfu Han, Yuhao Yan et al. · Water · 0 citations