Influence of Solid-Liquid Two-Phase Flow on Pressure Pulsation Characteristics in Axial Flow Pump Unit
Based on Euler multiphase model, RNG <italic>k</italic>-<italic>ε </italic>turbulence model, and SIMPLEC algorithm, a numerical simulation of solid-liquid two-phase flow in an axial flow pump was carried out to study the pressure fluctuation characteristics of the axial flow...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2025-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails?columnId=103688907&Fpath=home&index=0 |
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| Summary: | Based on Euler multiphase model, RNG <italic>k</italic>-<italic>ε </italic>turbulence model, and SIMPLEC algorithm, a numerical simulation of solid-liquid two-phase flow in an axial flow pump was carried out to study the pressure fluctuation characteristics of the axial flow pump when transporting a sediment-laden flow. The pressure fluctuation characteristics of the axial flow pump unit at different positions under the condition of clean water were emphasized, and the pressure pulsation characteristics with clean water medium and solid-liquid two-phase flow under the design condition were compared. The results show that the pressure pulsation at the impeller inlet and outlet of the axial flow pump unit presents obvious periodicity under the condition of clear water medium, and the amplitude increases gradually from the hub to the rim; the pulsation amplitude at the impeller outlet is less than that at the impeller inlet. The pulsation amplitude in the middle of the guide vane is smaller than that at the inlet and outlet of the impeller, and the pressure pulsation amplitude decreases first and then increases along the radial direction; the pressure pulsation amplitude at the outlet of the guide vane distributes irregularly along the radial direction. There is no obvious difference between the pressure pulsation amplitudes at the inlet of the impeller under the condition of clean water and solid-liquid two-phase flow, but the pressure pulsation waveform phase under the condition of two-phase flow lags behind about 0.04 s compared with that under the condition of clean water. The distribution law of pressure pulsation in the middle and at the outlet of the guide vane is quite different, and the amplitude of pressure pulsation is relatively large under the condition of solid-liquid two-phase flow. The vortex intensity distribution in the middle section of the guide vane is more complex than that in the clear water condition when the flow is laden with sediment, and the intensity is larger. The research results can provide some reference for the optimal design of axial flow pump units. |
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| ISSN: | 1001-9235 |