| During compresser working process, oil, water and other impurities will be produced.The presence of oil and water not only affects the cleanliness of compressed air, but alsoimpacts the life of air compressor and the subsequent mechanical components, and it willcause waste of resources and environmental pollution. Therefore gas-liquid separator hasbecome an important component in the entire compressed air system.A kind of inertial gas-liquid separator was selected for high-pressure air systempipeline.The internal flow field of this separator at different conditions were simulated byCFX, the separation performance of the separator was predicted, the effect of pressure on theseparation performance was analyzed, and the accuracy of the simulation results was verifiedthrough experimental methods. In addition, an optimization program was proposed forgas-liquid separator reentrainment problems, which a baffle was increased in the bottom of theseparator, and the improved separator was simulated. The results show that the experimentalresults and simulation results demonstrate consistent regularity, that is when the compressordisplacement is stationary, the higher the pressure, the smaller the inlet velocity, the greater theseparation efficiency.When the inlet velocity is less than2m/s, the separation efficiency canreach85%.The separation efficiency of separator has been improved significantly afteroptimization in the same conditions.Cyclone is usually used as compressor inbuilt gas-liquid separator, a new gas-liquidseparator was designed through increasing spiral plate structure on the basis of cyclone.TheCFX software was used to simulate the two-phase flow field, separation performance of thegas-liquid separators under high pressure.The simulated results showed same regularity withprevious studies. Besides, the new separator spiral structure optimization was studied; theeffect of screw number and helical pitch on separation efficiency and pressure drop wasanalyzed. By comparing theoretical analysis and simulation results, the reliability of thesimulation was validated.The results show that the separator with3laps,25mm pitch showshigher separation efficiency and smaller pressure loss compared to other structures in the sameconditions.The separation efficiency can reach98.5%, the pressure loss can be reduced to0.2MPa. |
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