Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Jianxu Zhou"'
Publikováno v:
Energy Science & Engineering, Vol 12, Iss 3, Pp 1137-1147 (2024)
Abstract With the rapid development of large‐capacity hydraulic turbines and pumped‐storage power stations, hydraulic vibration analysis attracts increasing attention nowadays. To explore the influence of torque and speed variation on hydraulic v
Externí odkaz:
https://doaj.org/article/23bada3db7a045cc9b03d6bc28ae139a
Publikováno v:
Frontiers in Energy Research, Vol 10 (2022)
Pipe vibration induced by water hammer frequently emerges in water conveyance system, especially in the hydropower plant or pumped storage power station with long diversion pipelines. This vibration in turn affects the hydraulic pulsation so that und
Externí odkaz:
https://doaj.org/article/b4fa5129d95f4284957dc4b1e923a813
Publikováno v:
Energies, Vol 16, Iss 11, p 4459 (2023)
Hydropower has grown to play an important role in power systems including increasing clean and low-carbon energies, and the effect of electric loads should be basically evaluated for the reliable operation of these systems. For the hydraulic–mechan
Externí odkaz:
https://doaj.org/article/6c3ffd93ae034f3593d36be4bccba843
Publikováno v:
Energy Science & Engineering, Vol 8, Iss 8, Pp 2722-2733 (2020)
Abstract For the different types of throttled surge tanks used in hydropower systems, it is important to comprehensively know the throttle's head loss characteristics for exact surge analysis and transient control. Herein, a general and complete expe
Externí odkaz:
https://doaj.org/article/6b3889b513154c8ba854cd47b9500630
Publikováno v:
Applied Sciences, Vol 11, Iss 12, p 5529 (2021)
To understand the hydraulic vibration characteristics in a traditional hydropower system and identify possible exciting sources that may induce serious hydraulic vibrations in the flow passage, experimental tests and numerical calculations were condu
Externí odkaz:
https://doaj.org/article/68aac60ebb3a4c0bbc3f71b53104b9a9
Publikováno v:
Water, Vol 12, Iss 4, p 1025 (2020)
Fluid–structure interaction (FSI) is a frequent and unstable inherent phenomenon in water conveyance systems. Especially in a system with a surge chamber, valve closing and the subsequent water level oscillation in the surge chamber are the excitat
Externí odkaz:
https://doaj.org/article/d53d5e9053db49f9bec56e30a2d97677
Modeling of the Free-Surface-Pressurized Flow of a Hydropower System with a Flat Ceiling Tail Tunnel
Autor:
Jianxu Zhou, Yongfa Li
Publikováno v:
Water, Vol 12, Iss 3, p 699 (2020)
For a water diversion hydropower system with a flat ceiling tail tunnel with high elevation, during transient states with relatively low tail water levels, free-surface-pressurized flow inevitably appears and its transient characteristics have obviou
Externí odkaz:
https://doaj.org/article/c585260e3cdd4ae48a43a6c82fde8b1e
Publikováno v:
Water, Vol 12, Iss 2, p 455 (2020)
A surge tank effectively reduces water hammer but experiences water level oscillations during transient processes. A double chamber surge tank is used in high head plants with appreciable variations in reservoir water levels to limit the maximum ampl
Externí odkaz:
https://doaj.org/article/0f6ff92134034df3afe2d34b1f7e66e5
Publikováno v:
Advances in Mechanical Engineering, Vol 9 (2017)
Axial-flow pumps with siphon outlet are widely used in South-to-North Water Transfer Project of China for the excellent characteristics and good performance in stopping period. The reverse rotational speed and the head of impeller are the key paramet
Externí odkaz:
https://doaj.org/article/23db8212b06e439ca4c82c4bd6c79ebb
Publikováno v:
Water, Vol 11, Iss 4, p 715 (2019)
In a pressurized water conveyance system, such as a hydropower system, during hydraulic transients, maximum and minimum pressures at various controlling sections are of prime concern for designing a safe and efficient surge tank. Similarly, quick dam
Externí odkaz:
https://doaj.org/article/dd8259bd246f4577bcaefab46c8e7bac