高校化学工程学报2017，Vol.31Issue(5)：1062-1071,10.DOI:10.3969/j.issn.1003-9015.2017.05.007
不同结构的旋风分离器二次涡的数值模拟和分析
Numerical Simulation and Analysis of Secondary Vortex in Different Cyclone Separators
摘要
Abstract
Effects of internal components on secondary vortex in cyclone separators were simulated by Fluent software using Reynolds stress model (RSM). Stairmand cyclone separator, diffusible cyclone separator and circumfluent cyclone separator were used as the investigation objects. The results show that the internal deflector of the circumfluent cyclone separator can effectively reduce "upper dust ring" and "short circuit flow"effects when compared with the other two cyclones. The velocities of secondary vortex at the top of the cylinder and the exhaust pipe are reduced from 23.6 m.s-1 and 32.1 m.s-1 to 10.2 m.s-1 and 25.7 m.s-1, respectively, while the turbulence intensity is reduced from 2.38% and 3.41% to 1.61% and 2.39%, respectively. The eddy scale factor at the top of the cylinder is reduced from 0.25 to 0.11. Reflective screen in the diffusible cyclone separator can significantly reduce "secondary dust" and "particle entrainment" effects, and the velocity of secondary vortex at the discharge port is reduced from 25.1 m.s-1 to 7.3 m.s-1 when compared with Stairmand cyclone separator. The scale factor and the turbulence intensity of the vortex are significantly reduced. The research shows that the influence of secondary vortex on the flow field can be reduced by rationally adding internal components to divert flow fields in the separator.关键词
旋风分离器/二次涡/流场导流/数值模拟Key words
cyclone/secondary vortex/flow field diversion/numerical simulation分类
化学化工引用本文复制引用
祝华腾,陈光辉,王伟文,李建隆..不同结构的旋风分离器二次涡的数值模拟和分析[J].高校化学工程学报,2017,31(5):1062-1071,10.基金项目
国家自然科学基金(21276132) （21276132）
山东省高等学校科技计划一般项目 A 类(J17KA107). （J17KA107）
