Full
Outline
To enhance the solid particle separation and collection capability during soil discharge in tunnel cast‑in‑place pile construction，an optimization study was conducted to optimize the cyclone separator.Computational Fluid Dynamics （CFD） was employed to simulate and optimize the key structural parameters of the cyclone separator.The effects of exhaust vent diameter，exhaust pipe insertion depth，and dust discharge outlet diameter on separation efficiency and pressure drop were systematically investigated.The results show that：at an exhaust vent diameter of 200 mm，separation efficiency reaches 87.0%；excessively small or large diameters induce flow disturbance or short⁃circuiting effects.With an exhaust pipe insertion depth of 400 mm，peak efficiency hits 87.7%；excessive depth causes backflow at the dust outlet.A dust discharge outlet diameter of 250 mm achieves maximum efficiency （88.3%）；larger diameters weaken the centrifugal force field.The optimized cyclone separator achieved a fine soil particle separation efficiency of 88.23% in field tests.This result，which aligns closely with simulation data，confirms the feasibility of the optimization scheme for engineering applications.The research can provide reference for the optimal design of cyclone separators.
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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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