Stability Analysis of Pump-Turbine in Hump Zone Based on Omega Vortex Identification Method DOI Open Access
Yuan Zheng,

Kui Tang,

Lianchen Xu

et al.

Water, Journal Year: 2024, Volume and Issue: 16(23), P. 3443 - 3443

Published: Nov. 29, 2024

As the central component of a pumped storage power station, pump-turbine frequently enters hump region during operation, which impacts safe functioning unit. This study investigates flow patterns at various guide vane openings within area, employing Omega vortex identification method. The results reveal that transitioning into from design conditions in an unsteady state vaneless space, seriously threatening stability pump-turbine. Notably, lowest point zone, space generates high-speed circulation characterized by large velocity gradients and severe separation. high turbulent kinetic energy intensifies with increasing opening. Additionally, low-frequency pressure pulsations become predominant frequency relative amplitude these reach higher values, is caused rotating stall. technique illustrates structure minimized optimal efficiency space. rate decreases, persistent high-energy vortices accumulate resulting significant increase vorticity intensity causing pump turbine.

Language: Английский

Staggered impeller configuration effects on energy transfer and pressure stability in two-stage centrifugal pumps for pumped-storage applications DOI
Changliang Ye, Jian Shi,

Dongsen An

et al.

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 112, P. 115514 - 115514

Published: Jan. 27, 2025

Language: Английский

Citations

0
A potential solution to recover energy from wastewater environment by using the single-channel pump as turbine DOI Creative Commons
Duc-Anh Nguyen, Cong-Τruong Dinh, Gyeong Sung Kim

et al.

Energy, Journal Year: 2025, Volume and Issue: 320, P. 135399 - 135399

Published: March 1, 2025

Language: Английский

Citations

0
Stability Analysis of Pump-Turbine in Hump Zone Based on Omega Vortex Identification Method DOI Open Access
Yuan Zheng,

Kui Tang,

Lianchen Xu

et al.

Water, Journal Year: 2024, Volume and Issue: 16(23), P. 3443 - 3443

Published: Nov. 29, 2024

As the central component of a pumped storage power station, pump-turbine frequently enters hump region during operation, which impacts safe functioning unit. This study investigates flow patterns at various guide vane openings within area, employing Omega vortex identification method. The results reveal that transitioning into from design conditions in an unsteady state vaneless space, seriously threatening stability pump-turbine. Notably, lowest point zone, space generates high-speed circulation characterized by large velocity gradients and severe separation. high turbulent kinetic energy intensifies with increasing opening. Additionally, low-frequency pressure pulsations become predominant frequency relative amplitude these reach higher values, is caused rotating stall. technique illustrates structure minimized optimal efficiency space. rate decreases, persistent high-energy vortices accumulate resulting significant increase vorticity intensity causing pump turbine.

Language: Английский

Citations

0