Investigation on the Influence of Flap Valve Area on Transition Process of Large Axial Flow Pump System

Autor: Xiaowen Zhang, Yuhang Jiang, Xijie Song, Fangping Tang, Jian Dai, Fan Yang, Hai Wang, Lijian Shi
Jazyk: angličtina
Rok vydání: 2023
Předmět:
Zdroj: Journal of Marine Science and Engineering, Vol 11, Iss 2, p 326 (2023)
Druh dokumentu: article
ISSN: 11020326
2077-1312
DOI: 10.3390/jmse11020326
Popis: The large axial flow pump systems used in coastal pump stations are often required to add flap valves to the gates to improve the quality of the transition process. However, due to the unclear mechanism of the additional flap valve on the transition process of the large axial flow pump system, there are many difficulties in the design and application of this feature. In this paper, six kinds of flap valves with different areas are designed. On the basis of the secondary development of the Flomaster software, the transient simulation method is used to study the impact of flap valves with different areas on the large axial flow pump system synchronous start-up process, the asynchronous start-up process, the synchronous stop process and the asynchronous stop process. The research results show that when the AOF is less than 38% Ag during the asynchronous startup, increasing the AOF can significantly improve the shunt ability of the flap valve during startup. However, in the process of asynchronous starting, the working capacity of the flap valve is less affected by the AOF. During the asynchronous shutdown process, the additional flap valve can effectively delay the attenuation of the LAPS flow and reduce the instantaneous head and power. However, when the AOF reaches 38% Ag, further increasing the AOF has no obvious gain in reducing the maximum instantaneous head and power of the LAPS. When the AOF increases from 38% Ag to 49% Ag, the maximum instantaneous head and the power of the LAPS only decrease by 2.7% and 1.4%, respectively.
Databáze: Directory of Open Access Journals
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