Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Lingjiu Zhou"'
Autor:
Dandan Yan, Shuqiang Chen, Peng Ren, Weiqiang Zhao, Xiaobin Chen, Chengming Liu, Lingjiu Zhou, Zhengwei Wang
Publikováno v:
Machines, Vol 12, Iss 8, p 586 (2024)
Kaplan turbine units can adjust their blades to achieve wider outputs without a significant loss of efficiency. The combination of guide vane angle (GVA) and blade angle (BA) is selected based on efficiency curves obtained from cam tests. However, th
Externí odkaz:
https://doaj.org/article/ecff236b829845eabf71c488fb48d514
Publikováno v:
Energies, Vol 17, Iss 11, p 2548 (2024)
Kaplan turbines are widely utilized in low-head and large flow power stations. This paper employs Computational Fluid Dynamics (CFD) to complete numerical calculations of the full flow channel under different blade angles and various guide vane openi
Externí odkaz:
https://doaj.org/article/498290c089d24177bd5142dbb4938967
Autor:
Jiayang Pang, Xiao Chang, Yuanyuan Gang, Ziyao Zhou, Wenping Xiang, Lingjiu Zhou, Xiaobing Liu, Zhengwei Wang
Publikováno v:
Journal of Marine Science and Engineering, Vol 12, Iss 5, p 777 (2024)
Sediment erosion damage is one of the main causes of structural failure in reaction turbine units. To study the mechanism through which sediment erosion affects the water-guiding mechanism of a reaction turbine unit, this study obtained the average c
Externí odkaz:
https://doaj.org/article/96875d86e3874beb94b95af6eec10748
Publikováno v:
Applied Sciences, Vol 13, Iss 22, p 12498 (2023)
This paper focuses on a 1000 MW Francis turbine and conducts a numerical analysis of the entire flow passage using computational fluid dynamics (CFD) under steady-state conditions. Building upon prior research, we further investigate the impact of an
Externí odkaz:
https://doaj.org/article/8ea15d48f9484f3fb84508d8bfca4216
Autor:
Xuyang Liu, Jiayang Pang, Lei Li, Weiqiang Zhao, Yupeng Wang, Dandan Yan, Lingjiu Zhou, Zhengwei Wang
Publikováno v:
Journal of Marine Science and Engineering, Vol 11, Iss 11, p 2068 (2023)
Because a pump-turbine mainly undertakes the role of energy conversion and pumped storage in the field of hydropower engineering, the complex transition process and frequent conversion between different working conditions lead to the increase in the
Externí odkaz:
https://doaj.org/article/fd469a9ba76a4cbcae018e32aa45beab
Autor:
Yongsheng Liu, Chengming Liu, Yongsheng Zhang, Xingxing Huang, Tao Guo, Lingjiu Zhou, Zhengwei Wang
Publikováno v:
Energies, Vol 16, Iss 4, p 1878 (2023)
To study the influence of the axial installation deviation of the runner on the hydraulic axial force of the 1000 MW Francis turbine unit, geometric models of the full flow passage of the Francis turbine with the runner sinking in the axial direction
Externí odkaz:
https://doaj.org/article/826677d2e31146299e2cf111b9b63f91
Publikováno v:
Journal of Marine Science and Engineering, Vol 10, Iss 4, p 528 (2022)
Unstable guide vane torsional mode self-excited vibrations that occur at small guide vane openings during the transient operations with pump flow, such as the starting and closing of the pump mode, are considered to have potentially severe consequenc
Externí odkaz:
https://doaj.org/article/1555a6fed80d4150b24ba6e18e2b3883
Numerical Investigation on the Effect of Asymmetry of Flow Velocity on the Wake Vortex of Hydrofoils
Publikováno v:
Journal of Marine Science and Engineering, Vol 10, Iss 4, p 546 (2022)
The Karman vortex street is a common flow phenomenon. In hydraulic machinery, it is usually located downstream of the guide vanes and the runner blades, which reduces hydraulic performance and may also cause fatigue damage to the structure. The lates
Externí odkaz:
https://doaj.org/article/18791fd93a0844c094ee2ace7529b1bf
Publikováno v:
Energies, Vol 12, Iss 9, p 1758 (2019)
It has been found recently that the dynamic behavior of a cavitating hydrofoil is different from that in pure water in that, not only are the natural frequencies different, but the mode shapes may also change. In order to elucidate the mechanism behi
Externí odkaz:
https://doaj.org/article/9829ca7e6a89497fbbc0cc9a5895e567
Publikováno v:
Energies, Vol 11, Iss 9, p 2320 (2018)
When discussing potential resonances in hydraulic turbine runners, cavitation effects are usually neglected. Nevertheless, recent studies have experimentally proved, that large cavitation volumes in the proximity of flexible simple structures, such a
Externí odkaz:
https://doaj.org/article/d40cc2649c234335ad82854db9b5767c