期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：240
期号：3
页码：1-11
DOI：10.1088/1755-1315/240/3/032020
出版社：IOP Publishing
摘要：A Pump sump or intake is a hydraulic structure with specific dimensions used to contain the water which has to be pumped into the piping system. Recently, the designers and engineers of pump station realized that the efficiency of pump station largely depends on sump structure design, not only on the performance of the selected pump. However, the poor intake design may result in many undesirable phenomena such as a form of swirl and vortices, which lead to affect the pump efficiency. In this study, both numerical and experimental analysis of a rectangular pump sump was carried out to predict swirl angle and free surface vortices formation. The swirl angle experimentally was obtained using a traditional swirl meter installed at the suction pipe in rectangular single pump intake. The objective was to obtain the average tangential velocity at different suction pipe diameter. For free surface vortices the objective was to observe the different vortex formation, air entrance and location. The swirl angle and average tangential velocity estimated by CFD simulation was in agreement with experimental results. The four types of free surface vortices (Surface swirl, Surface dimple, air bubbles and full air core to intake) was also observed clearly in ANSYS CFX.
