Focus on the spiral tube separator, model selection and basic parameters of numerical simulation are described. Flow field simulation analysis of spiral tube separators of both without holes and with holes are carried out respectively. Effects of gyration radius, inlet flowrate, number of spiral circles, and oil droplet diameter on flow field distribution and the separation performance of spiral tube separators are analyzed in detail. Simulation results also show that the gyration radius and inlet velocity are the two main factors affecting separation characteristics of spiral tube separators. In addition, the size of opening holes of spiral tube separator also affects separation result.

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