The concave-wall jet characteristics in vertical cylinder separator with inlet baffle component

doi:10.1016/j.cjche.2021.05.023

Abstract

Abstract: The concave-wall jet was formed in the vertical cylinder separator with inlet baffle component. The effect of curvature of radial baffle on the jet flow in the separator was investigated by the experiment of concentration and the numerical simulation of species transport. The results show that the concave-wall jet was confined within the narrow region near the concave-wall and the flow disturbance in the center of separator was weakened. The distribution of concentration and the flow region of wall jet depended on the curvature of radial baffle (K). Compared with the turbulent intensity of the plate baffle (K=0), that of concave baffle (K=2) reduced by 6.1% and the turbulent intensity of convex baffle (K=-2) increased by 13.5%. The best flow stability was obtained by the concave baffle because the baffle outlet was similar to convergent nozzle. The outlet convergent angle was between 0° and 19.5° when 0 ≤ K ≤ 2. The secondary vortices were caused by the tangential velocity irregularity on the cross-section of two axial baffles in the separator with convex baffle. The baffle with K ≥ 0 was more suitable in separator inlet than that with K < 0.

Key words: Concave-wall jet, Baffle component, Curvature, Concentration, Numerical simulation

摘要： The concave-wall jet was formed in the vertical cylinder separator with inlet baffle component. The effect of curvature of radial baffle on the jet flow in the separator was investigated by the experiment of concentration and the numerical simulation of species transport. The results show that the concave-wall jet was confined within the narrow region near the concave-wall and the flow disturbance in the center of separator was weakened. The distribution of concentration and the flow region of wall jet depended on the curvature of radial baffle (K). Compared with the turbulent intensity of the plate baffle (K=0), that of concave baffle (K=2) reduced by 6.1% and the turbulent intensity of convex baffle (K=-2) increased by 13.5%. The best flow stability was obtained by the concave baffle because the baffle outlet was similar to convergent nozzle. The outlet convergent angle was between 0° and 19.5° when 0 ≤ K ≤ 2. The secondary vortices were caused by the tangential velocity irregularity on the cross-section of two axial baffles in the separator with convex baffle. The baffle with K ≥ 0 was more suitable in separator inlet than that with K < 0.

关键词: Concave-wall jet, Baffle component, Curvature, Concentration, Numerical simulation

Jing Zhang, Zhongyi Ge, Wei Wang, Bin Gong, Yaxia Li, Jianhua Wu. The concave-wall jet characteristics in vertical cylinder separator with inlet baffle component[J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 178-189.

Jing Zhang, Zhongyi Ge, Wei Wang, Bin Gong, Yaxia Li, Jianhua Wu. The concave-wall jet characteristics in vertical cylinder separator with inlet baffle component[J]. 中国化学工程学报, 2022, 42(2): 178-189.

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