正态分布式弧形板除雾器压降的模拟研究  

Numerical simulation on demister pressure drop of normal distributed arc plate

作　　者：刘志超[1] 谢贺超 李艳波[1] 宋稳亚 

机构地区：[1]河南理工大学机械与动力工程学院,河南焦作454000

出　　处：《中国安全生产科学技术》2013年第12期30-34,共5页Journal of Safety Science and Technology

基　　金：河南理工大学热能工程重点学科项目资助(509927);河南理工大学博士基金(B2010-41)

摘　　要：为提高除雾器对瓦斯气体中细水雾的分离效率,同时确保气雾两相流流经除雾器后的压降符合要求。以气雾两相流动的均相流动模型为前提,根据稳定一维流动的基本方程推导出气雾两相流动的压降计算式;通过对瓦斯细水雾在除雾器中的流动进行数值模拟、分析,结果表明除雾器板间距、叶片长度、转折角和气流速度对压降都有影响,其中气流速度的变化对除雾器压降的影响较大,压降随气流速度的增大而增大;转折角的变化对除雾器压降的影响最大,压降随着转折角的增大而减小。这对正态分布式弧形板除雾器的优化设计有一定的指导意义。To improve the demister separation efficiency of water mist in the gas, at the same time ensure that the pressure drop of aerosol two-phase flow after passing through the mist eliminator can meet the requirement, on the premise of the homogeneous flow model of aerosol two-phase flow, a calculation formula of pressure drop for aerosol two-phase flow was derived according to the basic equation of steady one-dimensional flow. Through numerical sim- ulation and analysis on water mist and the gas flow in the demister, it showed that the pressure drop is affected by the demister plate spacing, leaf length, turning angle and air velocity. The pressure drop of mist eliminator is great- ly influenced by the change of air velocity, and the pressure drop increases with increasing of gas velocity. Turning angle changes is the most serious influence factor on the pressure drop of mist eliminator, the pressure drop increa- ses as the turning angle decreases. It has certain guiding significance to the optimization of design on normal distrib- uted arc plate demister.

关 键 词：正态分布 除雾器 压降 均相流 

分 类 号：X936[环境科学与工程—安全科学]