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To explore the influence of the blocking environment on the ice-class propeller's hydrodynamic and cavitation characteristics and to help the optimization design of ice-class propellers, a test platform was built under the ice blocking environment in a large cavitation channel. The hydrodynamic loads of the whole propeller and a single blade were measured while cavitation patterns with different blocking parameters were observed under ambient pressure and depressurized conditions. The test results show that the hydrodynamic performance of the propeller under ice blocking conditions is the result of the combined effects of the ice blocking parameters, the cavitation environment and the propeller operating conditions. Under the combined influence of ice blocking effect, proximity effect, propeller suction, reflux zone and the "Pirouette effect", the conjoined vortex between the ice and the propeller blade will be induced and severe fluctuations are caused in the propeller's hydrodynamic performance.
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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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