新型旋流分离器内固液两相流的数值模拟

    Numerical simulation of solid-liquid flow in a new kind of cyclone

    • 摘要: 旋流分离技术在水体中消减固体污染物质的应用是一项新兴的污染控制技术,通过对传统旋流器进行改进设计的旋流分离器体积小,安装便利,可用于城市污水处理。文章通过利用CFD软件FLUENT对其进行数值模拟,其中湍流相采用带旋流修正的K-ε模型,离散颗粒相采用DPM模型,通过数值模拟可知该旋流分离器内部三维流场的动、静压力分布以及切向、轴向和径向速度场分布云图,并且计算出该新型旋流分离器虽然没有明显的分级作用,但其分离效率高达66%。并在此基础上,提出了该新型旋流分离器的部分设计要点。

       

      Abstract: The technology of swirl separation is a newly-developed pollution control technology for removing solid pollution in water. By improving the traditional hydrocyclone, a new kind of swirl separator, which is small, convenient to install and can be used in the municipal sewage disposal has been designed. In this paper the authors discuss the technology by numerical simulation with the CFD software FLUENT, using the realizable K-ε model and DPM model. According to the simulation, the distribution of both dynamic and static pressure and the contour of tangential, axial and radial velocity can be obtained. Also it could be concluded that although it is not good at classification, this kind of new swirl separator can reach a high separation efficiency at 66%. Based on the simulation result the authors give the key to the design of this kind of new swirl separator.

       

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