Numerical Calculation of the Transient Process of a Self‐Priming Pump During Closed‐Valve Starting and Valve Opening.
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| Title: | Numerical Calculation of the Transient Process of a Self‐Priming Pump During Closed‐Valve Starting and Valve Opening. |
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| Authors: | Li, Xin1 (AUTHOR), Yang, Ze‐Zhou2 (AUTHOR), Zhang, Yu‐Liang1 (AUTHOR) zhang002@sina.com, Li, Jin‐Fu2 (AUTHOR), Guo, Xiao‐Mei3 (AUTHOR), Xu, Xiao‐Wei1 (AUTHOR) |
| Source: | Energy Science & Engineering. Oct2025, Vol. 13 Issue 10, p5008-5029. 22p. |
| Subject Terms: | *Water pumps, *Transients (Dynamics), *Fluid dynamics, *Multiphase flow, *Numerical calculations, *Valves |
| Abstract: | To investigate the characteristics of a particular self‐priming pump during its typical starting operation, this paper constructs a circulating pipeline system that includes the self‐priming pump, tank, and other components. Initially, air is set up in the upper part of the tank and the self‐priming pump, while the rest of the system is filled with clear water. Additionally, the user‐defined function is employed to incorporate the speed‐up phase into the calculation. Consequently, the established computational physical model aligns well with actual conditions, effectively reflecting the true and complete self‐priming process. Based on the volume of fluid (VOF) multiphase flow model, numerical studies were conducted to examine the impact of three different valve‐opening patterns on the self‐priming performance of the pump. The research findings indicate that the valve‐opening pattern primarily affects the duration required for the oscillatory air discharge phase, and this duration does not have a direct proportional relationship with the valve‐opening time. A slower valve‐opening rate results in a slower increase in the velocity within the inlet pipe, significantly prolonging the self‐priming time. During the early stage of closed‐valve starting, the head value inside the pump exhibits a rapid upward trend; subsequently, a large accumulation of gas in the outlet pipe leads to a reduction in the head. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | To investigate the characteristics of a particular self‐priming pump during its typical starting operation, this paper constructs a circulating pipeline system that includes the self‐priming pump, tank, and other components. Initially, air is set up in the upper part of the tank and the self‐priming pump, while the rest of the system is filled with clear water. Additionally, the user‐defined function is employed to incorporate the speed‐up phase into the calculation. Consequently, the established computational physical model aligns well with actual conditions, effectively reflecting the true and complete self‐priming process. Based on the volume of fluid (VOF) multiphase flow model, numerical studies were conducted to examine the impact of three different valve‐opening patterns on the self‐priming performance of the pump. The research findings indicate that the valve‐opening pattern primarily affects the duration required for the oscillatory air discharge phase, and this duration does not have a direct proportional relationship with the valve‐opening time. A slower valve‐opening rate results in a slower increase in the velocity within the inlet pipe, significantly prolonging the self‐priming time. During the early stage of closed‐valve starting, the head value inside the pump exhibits a rapid upward trend; subsequently, a large accumulation of gas in the outlet pipe leads to a reduction in the head. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 20500505 |
| DOI: | 10.1002/ese3.70224 |
