Full
Outline
To investigate the impact of the impeller design on the cavitation performance of disc pumps，a blade root arc modification method was introduced for a specific type of disc pump. The simulations employed the SST k-ε turbulence model combined with the Zwart-Gerber-Belamri cavitation model. Verification through external characteristics testing confirmed an error margin within 5%. Analysis of pressure distribution，cavitation volume，and turbulent kinetic energy within the impeller revealed that the blade root arc structure enhances both the head and efficiency of the disc pump. When the cavitation margin is 2.5 m，the head for the blade root arc model was 12.373 3 m，compared to 7.456 6 m for the original model，marking an increase of 65.94%. Under different cavitation margin （2.5，3.0，8.0，12.0 m），the average pressure of the blade root arc model is 1.23%~23.13% higher than that of the original model，The diffusion of the low pressure region is suppressed，and the pressure gradient between the pressure surface and the suction surface of the impeller is reduced，lessens the cavitation volume inside the impeller，significantly reduces turbulent kinetic energy at the impeller outlet，decreases energy dissipation，and stabilizes the flow channel. In conclusion，the blade root arc model notably suppresses cavitation in disc pumps and enhances their hydraulic performance. This study provides some reference for the performance optimization design of disc pump.
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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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