Numerical study of flow field in new design cyclone separators with one, two and three tangential inlets

Cyclone(编程语言) 机械 湍流 雷诺应力 压力降 气象学 涡流 气旋分离 计算流体力学 入口 计算机模拟 湍流动能 物理 环境科学 工程类 机械工程 嵌入式系统 现场可编程门阵列
作者
Hamed Safikhani,Javid Zamani,Mohammadreza Musa
出处
期刊:Advanced Powder Technology [Elsevier BV]
卷期号:29 (3): 611-622 被引量:65
标识
DOI:10.1016/j.apt.2017.12.002
摘要

Numerical study of the fluid flow and particle dynamics is presented by numerical techniques to characterize the performance of new design cyclone separators with one, two and three tangential inlets. The design of this cyclone is based on the idea of improving cyclone performance by increasing the vortex length. This cyclone differs from a conventional cyclone with the separation space. Instead of conical part, the separation space of this cyclone consists of an outer cylinder and a vortex limiter. The Reynolds averaged Navier–Stokes equations with Reynolds stress turbulence model (RSM) are solved by use of the finite volume method based on the SIMPLE pressure correction algorithm in the computational domain. The Eulerian-Lagrangian computational procedure is used to predict particles tracking in the cyclones. The velocity fluctuations are simulated using the Discrete Random Walk (DRW). In the results the effects of number of inlets on the different important parameters such as pressure drop, collection efficiency, axial velocity and turbulence are investigated and deeply discussed. Contours of velocity, pressure and turbulent kinetic energy within these cyclones with different number of inlets are shown. The results show that the cyclone with three inlets has more collection efficiency, less pressure drop and less turbulence distribution with respect to cyclones with one and two inlets which is good in cyclones performance. Generally it is recommended to use the new cyclone designs with higher number of inlets.
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