Publication: Anti-vortex device efficiency for pump sump using hydraulic physical model
| datacite.subject.fos | oecd::Engineering and technology::Civil engineering | |
| dc.contributor.author | Wahidah, Nur Rizzuan | |
| dc.date.accessioned | 2025-12-03T02:35:48Z | |
| dc.date.available | 2025-12-03T02:35:48Z | |
| dc.date.issued | 2024-07-01 | |
| dc.description.abstract | Pump sump design is very crucial in order to optimize pump inflow and pump efficiency. The pump may become damaged as a result of the vortex that forms around the pump sump suction area. The vortex may change particle velocity and increase impeller erosion. A vortex is a special form of fluid motion, with unstable and nonlinear characteristics. There are two types of vortices that occur at a pump station inlet: a submerged vortex and a free surface vortex. The free surface vortex has a great impact on the project, which will reduce the effective water flow section at the inlet of the pump station and reduce the flow capacity. To increase pump efficiency, a phenomenon called vortex generation near the pump entrance in the sump during intake needs to be managed. In this study, a pump sump model is equipped with five variations of an anti-vortex device (AVD) types at five different water level in order to assess how the anti-vortex device design affects the efficiency of vortex management in the intake flow. According to the ANSI/HI standard, the sump that produced vortex must be eliminated and the swirl angle in the flow must not be greater than 5°. All AVD variations used in this study were successful in removing the free surface vortices (FSV) at high water level (853.5 mm, 638.5 mm and 463.5 mm) but the majority of them occurred at low water level (400 mm and 370 mm). This can be avoided by placing modification of an anti-vortex device (AVD) which are back wall fillet and Floating-Anti Vortex Device (F-AVD) near the intake pipe in the pump sump. The function of Floating Anti-Vortex Device (F-AVD) is to prevent and eliminate the formation of vortices and swirl in the water flow during low water level. Proved that after placing the back wall splitter and F-AVD, the swirl angle is reaching less than 5° which achieve the lowest swirl angle reading (2.3°). As opposed to a case where there is no AVD, the application of back wall splitter and F-AVD greatly improves performance in swirl angle reduction and vortex suppression. | |
| dc.identifier.uri | https://erepo.usm.my/handle/123456789/23300 | |
| dc.language.iso | en | |
| dc.title | Anti-vortex device efficiency for pump sump using hydraulic physical model | |
| dc.type | Resource Types::text::thesis::master thesis | |
| dspace.entity.type | Publication | |
| oairecerif.author.affiliation | Universiti Sains Malaysia |