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| Characteristics and experiment of flow field in barrel of single stage screw press based on CFD |
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| DOI： |
| KeyWord:single stage screw press barrel fluid-solid coupling Fluent |
| FundProject:国家重点研发计划项目子课题（2016YFD0400305）；北京市教育委员会科研计划项目（PXM2019_014213_000007, KM201910011002） |
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| Abstract: |
| A typical unidirectional fluid-solid coupling was produced by squeezing each other of oilseeds, worm shaft and barrel in the press. In order to clarify the movement of the oilseeds and the effects of temperature, pressure on the oil yield, firstly a geometry model of the worm shaft of a single stage screw press with variable cross-section was established, then a fluid domain of the barrel was established in Fluent based on the actual volume, the fluid-solid coupling of the oilseeds, worm shaft and barrel was calculated by Euler multiphase flow model of CFD under the condition that the mixture of crushed peanut particles and oil was full of the barrel. The results showed that with the special screw speed, the fluid in the barrel rotated with the worm shaft and flowed along the length of the worm shaft; when the volume fraction was taken as the concentration of the oil, the oil concentration increased along the length of the worm shaft. When the pressure was constant, the higher the temperature was, the greater the oil concentration was, and when the temperature was constant, the higher the pressure was, the greater the oil concentration was. The experiment also verified that the oil yield was higher at 80 ℃ and 10 MPa. The research results provided a theoretical basis for worm shaft design, pressure and temperature setting, etc. in the actual pressing process. |
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