2022
Wang, Wenjie; Tai, Geyuan; Pei, Ji; Pavesi, Giorgio; Yuan, Shouqi
Numerical investigation of the effect of the closure law of wicket gates on the transient characteristics of pump-turbine in pump mode Journal Article
In: Renewable Energy, vol. 194, pp. 719-733, 2022, ISSN: 18790682.
Links | BibTeX | Tags: Continuous Wavelet Transform, Detached Eddy simulation, Pressure pulsation, Pump as Turbine, Shutdown process, Wicket gates closure law
@article{Pumpturbine,
title = {Numerical investigation of the effect of the closure law of wicket gates on the transient characteristics of pump-turbine in pump mode},
author = {Wenjie Wang and Geyuan Tai and Ji Pei and Giorgio Pavesi and Shouqi Yuan},
url = {https://linkinghub.elsevier.com/retrieve/pii/S0960148122007807 https://www.sciencedirect.com/science/article/pii/S0960148122007807},
doi = {10.1016/j.renene.2022.05.129},
issn = {18790682},
year = {2022},
date = {2022-01-01},
journal = {Renewable Energy},
volume = {194},
pages = {719-733},
publisher = {Elsevier Ltd},
keywords = {Continuous Wavelet Transform, Detached Eddy simulation, Pressure pulsation, Pump as Turbine, Shutdown process, Wicket gates closure law},
pubstate = {published},
tppubtype = {article}
}
2019
Mao, Xiuli; Pavesi, Giorgio; Chen, Diyi; Xu, Hengshan; Mao, Gaojun
Flow induced noise characterization of pump turbine in continuous and intermittent load rejection processes Journal Article
In: Renewable Energy, vol. 139, pp. 1029-1039, 2019, ISSN: 18790682.
Abstract | Links | BibTeX | Tags: Flow induced noise, Hydroelectric energy, Load rejection, Pressure fluctuations, Pump as Turbine
@article{Mao2019a,
title = {Flow induced noise characterization of pump turbine in continuous and intermittent load rejection processes},
author = {Xiuli Mao and Giorgio Pavesi and Diyi Chen and Hengshan Xu and Gaojun Mao},
url = {https://doi.org/10.1016/j.renene.2019.02.116},
doi = {10.1016/j.renene.2019.02.116},
issn = {18790682},
year = {2019},
date = {2019-01-01},
journal = {Renewable Energy},
volume = {139},
pages = {1029-1039},
publisher = {Elsevier Ltd},
abstract = {In order to study pump turbine stability in view of flow induced noise, this paper focuses on two-part operation of one high head reversible turbine: transient load rejection process and intermittent vane closing conditions. Both above simulations are solved by DES turbulent model, additionally, the flow field results are regarded as sound source and analyzed comparatively by LMS software. Except for flow field interpretation, some developing rules of flow induced noise during the period of pump turbine load rejection are found. The result indicates that flow induced noise radiation is consistent with internal fluid characteristics, and the developing trends are similar which acquired from these two part calculations, whereas the values are distinct. This work provides a reference for the study of pump turbine operating stability from the acoustic aspect, and for pump turbine design work as well.},
keywords = {Flow induced noise, Hydroelectric energy, Load rejection, Pressure fluctuations, Pump as Turbine},
pubstate = {published},
tppubtype = {article}
}
In order to study pump turbine stability in view of flow induced noise, this paper focuses on two-part operation of one high head reversible turbine: transient load rejection process and intermittent vane closing conditions. Both above simulations are solved by DES turbulent model, additionally, the flow field results are regarded as sound source and analyzed comparatively by LMS software. Except for flow field interpretation, some developing rules of flow induced noise during the period of pump turbine load rejection are found. The result indicates that flow induced noise radiation is consistent with internal fluid characteristics, and the developing trends are similar which acquired from these two part calculations, whereas the values are distinct. This work provides a reference for the study of pump turbine operating stability from the acoustic aspect, and for pump turbine design work as well.
2016
Yang, Jun; Yuan, Shouqi; Pavesi, Giorgio; Li, Chun; Ye, Zhou; Shouqi, Yuan
Study of Hump Instability Phenomena in Pump Turbine at Large Partial Flow Conditions on Pump Mode Journal Article
In: Journal of Mechanical Engineering, vol. 52, iss. 24, pp. 170, 2016, ISSN: 0577-6686.
Abstract | Links | BibTeX | Tags: Francis-type Reversible Turbine, Hump instability, large partial flow conditions, Pump, Pump, Pump as Turbine, Pump Mode, unsteady flow pattern
@article{Yang2016,
title = {Study of Hump Instability Phenomena in Pump Turbine at Large Partial Flow Conditions on Pump Mode},
author = {Jun Yang and Shouqi Yuan and Giorgio Pavesi and Chun Li and Zhou Ye and Yuan Shouqi},
url = {http://www.cjmenet.com.cn/Jwk_jxgcxb/CN/10.3901/JME.2016.24.170},
doi = {10.3901/JME.2016.24.170},
issn = {0577-6686},
year = {2016},
date = {2016-01-01},
urldate = {2016-01-01},
journal = {Journal of Mechanical Engineering},
volume = {52},
issue = {24},
pages = {170},
abstract = {For middle- and high-specific speed pump turbines, the hump instability appearing at large partial flow conditions seriously restricts its stable operation range. These phenomena relate closely to the inner unsteady flow in pump turbine. We investigate the characterization of pressure fluctuation and the mechanism of unsteady flow by an experimental and numerical study of the unsteady flow occurring among the adjustable blades. For pump working at either full or part load conditions, two kinds of periodic pressure pulsations in the diffuser vane have been observed and analyzed. A hump instability appears only when the actual flow rate of head curve is 0.45-0.75 times of the designed value, and our frequency analysis further shows that its appearance is closely related to the two above pressure fluctuations.},
keywords = {Francis-type Reversible Turbine, Hump instability, large partial flow conditions, Pump, Pump, Pump as Turbine, Pump Mode, unsteady flow pattern},
pubstate = {published},
tppubtype = {article}
}
For middle- and high-specific speed pump turbines, the hump instability appearing at large partial flow conditions seriously restricts its stable operation range. These phenomena relate closely to the inner unsteady flow in pump turbine. We investigate the characterization of pressure fluctuation and the mechanism of unsteady flow by an experimental and numerical study of the unsteady flow occurring among the adjustable blades. For pump working at either full or part load conditions, two kinds of periodic pressure pulsations in the diffuser vane have been observed and analyzed. A hump instability appears only when the actual flow rate of head curve is 0.45-0.75 times of the designed value, and our frequency analysis further shows that its appearance is closely related to the two above pressure fluctuations.
