Simulation Analysis of Vibration Induced by Solid-Liquid Two-Phase Flow in Sand Mixing Pump
Due to harsh working environment， vibration failure often occurs in sand mixing pump for hydraulic fracturing. To solve this problem， a CFD-DEM coupling calculation method was used to build a solid-liquid two-phase flow simulation model. Under the condition of different impeller speeds， flow rates，...
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| Päätekijät: | , , , , , , |
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| Aineistotyyppi: | Artikkeli |
| Kieli: | kiina |
| Julkaistu: |
Editorial Office of China Petroleum Machinery
2025-06-01
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| Sarja: | Shiyou jixie |
| Aiheet: | |
| Linkit: | http://www.syjxzz.com.cn/en/#/digest?ArticleID=4971 |
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| Yhteenveto: | Due to harsh working environment， vibration failure often occurs in sand mixing pump for hydraulic fracturing. To solve this problem， a CFD-DEM coupling calculation method was used to build a solid-liquid two-phase flow simulation model. Under the condition of different impeller speeds， flow rates， particle sizes and sand mixing concentrations， the influence of external characteristics of centrifugal pump under solid-liquid two-phase flow condition was analyzed. Meanwhile， the fluid forces acting on the volute and impeller of the centrifugal pump in the x， y and z directions were monitored and analyzed， and the power spectral density curves of the volute and impeller in the x， y and z directions were obtained using the periodogram method. The research results show that the addition of particle phase leads to a decrease in the delivery head and efficiency of centrifugal pump. The main vibration directions of the impeller and volute are the axial direction of the impeller and the outlet direction of the volute respectively， and the main vibration frequency is the blade frequency. The impeller speed and flow rate are the main factors affecting the vibration power of centrifugal pump： every time the impeller speed rises by 100 r/min， the main vibration power of the impeller and volute is increased by 36.15% and 37.71% respectively， every time the flow rate increases by 3.78 m3/min， the main vibration power of the impeller is increased by 28.45% on average， and that of the volute decreased by 11.27% on average. The influence of sand concentration and particle size on vibration is relatively small. |
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| ISSN: | 1001-4578 |