2025
Zhang, Xiaowen; Pavesi, Giorgio; Hu, Chongyang; Song, Xijie; Tang, Fangping
Impact of the motion effect of the cutoff facility on the dynamic energy loss of the prototype axial flow pump system during the startup process Journal Article
In: Physics of Fluids, vol. 37, iss. 1, 2025, ISSN: 10897666.
Abstract | Links | BibTeX | Tags: Axial Pump, Energy loss, Pump, startup
@article{Zhang2025,
title = {Impact of the motion effect of the cutoff facility on the dynamic energy loss of the prototype axial flow pump system during the startup process},
author = {Xiaowen Zhang and Giorgio Pavesi and Chongyang Hu and Xijie Song and Fangping Tang},
doi = {10.1063/5.0250407},
issn = {10897666},
year = {2025},
date = {2025-01-01},
urldate = {2025-01-01},
journal = {Physics of Fluids},
volume = {37},
issue = {1},
publisher = {American Institute of Physics},
abstract = {Large pumping systems have emerged as one of the primary areas of energy consumption. During the startup process (SUP) of the axial flow pump system (AFPS), a complex interaction unfolds involving the motion of the cutoff facilities (COF), the acceleration of the pump, and the phenomenon of energy dissipation. The kinematic characteristics of the COF significantly influence the flow patterns, dynamic loads, and energy transfer experienced by the system. This study investigates the energy dissipation mechanism of a prototype AFPS (PAFPS) during SUP, utilizing a combination of experiments on engine starting characteristics, computational fluid dynamics, and in-field measurements of the PAFPS. Two COF motion modes are compared, revealing that accelerated gate opening improves transition efficiency and reduces energy consumption. Key findings highlight that accelerated gate motion minimizes turbulence-induced losses near the COF exit and suppresses high entropy production regions in the impeller domain, leading to smoother and more energy-efficient operations. These insights offer actionable strategies to enhance pump system performance during SUP.},
keywords = {Axial Pump, Energy loss, Pump, startup},
pubstate = {published},
tppubtype = {article}
}
Large pumping systems have emerged as one of the primary areas of energy consumption. During the startup process (SUP) of the axial flow pump system (AFPS), a complex interaction unfolds involving the motion of the cutoff facilities (COF), the acceleration of the pump, and the phenomenon of energy dissipation. The kinematic characteristics of the COF significantly influence the flow patterns, dynamic loads, and energy transfer experienced by the system. This study investigates the energy dissipation mechanism of a prototype AFPS (PAFPS) during SUP, utilizing a combination of experiments on engine starting characteristics, computational fluid dynamics, and in-field measurements of the PAFPS. Two COF motion modes are compared, revealing that accelerated gate opening improves transition efficiency and reduces energy consumption. Key findings highlight that accelerated gate motion minimizes turbulence-induced losses near the COF exit and suppresses high entropy production regions in the impeller domain, leading to smoother and more energy-efficient operations. These insights offer actionable strategies to enhance pump system performance during SUP.
1990
Ardizzon, Guido; Pavesi, Giorgio
In: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, vol. 204, iss. 6, 1990, ISSN: 20412983.
Abstract | Links | BibTeX | Tags: Axial Pump, Blade Stacking, Pump
@article{Ardizzon1990,
title = {Influence of the blade stacking on the flow through an axial flow runner and predictions of three-dimensional and quasi three-dimensional numerical codes},
author = {Guido Ardizzon and Giorgio Pavesi},
doi = {10.1243/PIME_PROC_1990_204_119_02},
issn = {20412983},
year = {1990},
date = {1990-01-01},
urldate = {1990-01-01},
journal = {Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science},
volume = {204},
issue = {6},
abstract = {The influence of the stacking of the blade sections on the flow through an axial flow runner is investigated by means of quasi and three-dimensional finite element programs. The results show up higher pressure gradients close to the leading edges, in the sections near the hub, when the stacking point is displaced towards the trailing edge. These gradients become noticeable near the trailing edge when the stacking point moves towards the inlet, even if in an attenuated way these trends reverse in sections close to the shroud. The above-mentioned effects are highlighted only if three-dimensional codes or quasi three-dimensional codes with more than one hub-to-shroud surface are employed. ? 1990, Institution of Mechanical Engineers. All rights reserved.},
keywords = {Axial Pump, Blade Stacking, Pump},
pubstate = {published},
tppubtype = {article}
}
The influence of the stacking of the blade sections on the flow through an axial flow runner is investigated by means of quasi and three-dimensional finite element programs. The results show up higher pressure gradients close to the leading edges, in the sections near the hub, when the stacking point is displaced towards the trailing edge. These gradients become noticeable near the trailing edge when the stacking point moves towards the inlet, even if in an attenuated way these trends reverse in sections close to the shroud. The above-mentioned effects are highlighted only if three-dimensional codes or quasi three-dimensional codes with more than one hub-to-shroud surface are employed. ? 1990, Institution of Mechanical Engineers. All rights reserved.
