Full
Outline
To address the performance failure of conventional centrifugal pumps under high gas content multiphase transportation conditions，a high‑speed gas‑liquid multiphase booster pump covering conventional centrifugal pump performance parameters was designed.Maintaining bubbly inflow and through visualization testing，its performance and internal flow characteristics under variable conditions were analyzed.The results show that the pump can transport mixed medium with inlet gas volume fraction of 55% under rated conditions；as inlet gas volume fraction increases，the pump head coefficient shows a nonlinear decreasing trend，and the inlet flow pattern gradually transitions from bubbly flow Ⅰ to bubbly flow Ⅱ，Ⅲ，Ⅳ.When the flow pattern develops to bubbly flow Ⅲ，the pump performance loss and inlet flow pattern transition delay reach their maximum；increasing rotational speed can achieve up to 6.65% maximum inlet flow pattern transition delay rate and enhance the pump's gas mixing resistance capability；small liquid flow rate helps slow down performance degradation under high inlet gas volume fraction conditions，while increasing liquid flow rate intensifies gas‑liquid separation inside the pump；reducing liquid flow rate can achieve up to 7.04% maximum inlet flow pattern transition delay rate.This research provides theoretical support for the optimal design and efficient operation of gas‑liquid multiphase booster pumps.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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