| In this work, the theoretical study of turbulent filed simulation ofα-typehydrocyclone was carried out with FLUENT6.2 CFD software. The vortex in theseparator, the moving behavior of the particles, as well as the factor which influencethe separation efficiency were analyzed in order to improve the performance of theα-type hydrocyclone. On the base of simulation, the researcher put forward usingextend overflow tube to improve the performance of theα-type hydrocyclone. Theworks are as following:1.The method of FLUENT6.2 and RSM model were selected to simulate theα-type hydrocyclone and the results showed that: It eliminated the influence of"sandannulus"; the flow filed was more steady and the energy loss was more decreased.2.On the base of RSM model simulation, the moving behavior of the particles wasstudied with the stochastic model of interaction with continuous phase elementarily,and the simulation results were compared with the experiments. It showed that theresult of experiment can forecast the efficiency of different size of particles.3.The solution was put forward to use extend overflow tube for betterperformance. Simulation results showed that: the structure change of overflow tubedidn't change the distribution of pressure. In the overflow tube, it just had an influenceon the dynamic pressure; in the separate space, the distribution trend of pressure wasthe same with traditional hydrocyclone. The tangential velocity in the overflow tubedeclined compared with the traditional hydrocyclone, but in other available separatespace, the tangential velocity ascend. It illuminated that: The centrifugal force wasenhanced which can improve the separation efficiency.4.The configuration optimized overflow tube was thus designed and added to theexperimental setup and the results of the experiment proved that this extend overflowtube can improve the performance ofα-type hydrocyclone successfully.
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