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Taking the mixed-flow pump turbine as the research object, a fully elliptical volute was designed, which could meet the working conditions of the turbine and the pump. The ratio of the length and short half axis of the elliptical section of the volute was guaranteed to be fixed. The worm shell was designed by its outlet circumferential velocity and the circumferential velocity moment of each section, and the relationship between the size and flow rate of each section of the volute was given. Through CFD numerical simulation, the variation law of the circumferential velocity of the volute outlet and the circumferential velocity moment of each section was obtained. The distribution law of the velocity and pressure inside the volute was summarized, and the simulation results meet the design requirements, which has high practical application value.
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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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