Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113447 - 113447
Published: Aug. 29, 2024
Language: Английский
Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113250 - 113250
Published: Aug. 8, 2024
Language: Английский
Citations
9
Energies, Journal Year: 2025, Volume and Issue: 18(2), P. 394 - 394
Published: Jan. 17, 2025
As the core for energy conversion in pumped storage plants, pump turbine is also a key component process of building clean power grid, owing to its fast and accurate load regulation. This paper introduces current status research development turbines from perspectives significance, design optimization, operational performance, advanced methods, etc. Internal external characteristics such as transient flow evolution, structural vibration, flow-induced noise, etc., not only reflect performance (hydraulic, cavitation, sediment abrasion, stability etc.) but directly affect safe efficient operation system. It worth mentioning that space-time evolution internal an emerging direction, results which can be used predict conditions turbines. Moreover, application intelligent condition monitoring fault diagnosis aim prevent failures accidents plants.
Language: Английский
Citations
1
Physics of Fluids, Journal Year: 2025, Volume and Issue: 37(2)
Published: Feb. 1, 2025
Axial hydraulic thrust is a crucial factor contributing to the unstable operation of pump-turbine especially under off-design conditions. Pressure-balance pipe can effectively achieve axial balance pump-turbine. In this study, impact diameter and location pressure-balance on runaway condition investigated. The influence mechanism pressure distribution internal flow patterns further explored. results show that pipes have relatively minor while increase in causes rise thrust. Compared with outer pipe, inner demonstrates more significant effect force runner. Additionally, low-frequency components at 0.6 times runner rotational frequency are observed, which indicate occurrence stall vaneless area. variation also affects number passages vortices, as well quantity vortices. With diameter, backflow phenomena negative regions gradually emerge result chaotic flow.
Language: Английский
Citations
1
Scientific Reports, Journal Year: 2025, Volume and Issue: 15(1)
Published: Feb. 22, 2025
As the global demand for energy conservation increases, achieving efficient conversion in fans has become a significant challenge field of mine ventilation. To investigate influence blade installation angle distribution spanwise direction on characteristics mining counter-rotating axial flow fan, three optimization schemes were proposed this paper. The internal fan was obtained by numerical simulation and experimental methods. Based entropy production theory, correlation between loss parameters established, thus quantitative assessment loss. research findings indicate differences before after optimization, with scheme OP1 (when case 1 is applied to both front impeller rear impeller) demonstrating superior performance. Compared original efficiency total pressure increase 1.1% 1.3%, respectively, under 1.0 QBEP condition (QBEP rate at best point). Furthermore, 1.2 condition, improvements reach 3.1% 4.7%, respectively. improvement mainly attributed reduction induced turbulent dissipation within downstream domain. Notably, distinct rates extension pipe different schemes, reduced 24.6% compared that condition.
Language: Английский
Citations
0
Sustainable Energy Technologies and Assessments, Journal Year: 2025, Volume and Issue: 77, P. 104337 - 104337
Published: April 25, 2025
Language: Английский
Citations
0
Journal of Energy Storage, Journal Year: 2024, Volume and Issue: 99, P. 113447 - 113447
Published: Aug. 29, 2024
Language: Английский
Citations
2