摘要
利用数值模拟的方法,采用Reynolds应力输运模型和随机轨道模型,对一种立式天然气多管旋风分离内的湍流气粒两相流动进行了全尺寸的数值模拟。为了反映真实的流动过程,计算过程中对进气室、集气室、集尘室及各轴流旋风分离器等复杂结构没有进行简化,并实现了完全结构化的网格划分。结果表明,除尘器内各旋风单管的工作状态并不相同,集尘室内含尘气体在各单管间发生窜流返混,影响了多管旋风分离的分离效率;此外,计算结果还表明,适度提高泄气率有助于抑制单管间的窜流返混,为天然气立式多管旋风分离的优化设计提供了理论依据。
Making use of numerical modeling,Reynolds stress model（ RSM） and stochastic tracking model,the full-size numerical simulation of gas-particle turbulent flow in a natural gas＇ vertical multi-tube cyclone separator was performed. In order to obtain the precise flow condition,the complex structure of gas intake chamber,gas collection chamber,dust collection chamber and axial flow cyclone separator were kept unchanged during the calculation process,and their completely-structured grid were achieved. The study results show that different working conditions of cyclone separator tubes can result in the formation of back-mixing of cross-flow which affecting the efficiency of natural gas vertical multi-tube cyclone separator; meanwhile,properly increasing the gas leakage rate can suppress cross-flow back-mixing among cyclone separator tubes,this provides a good theoretical basis for design optimization of the natural gas vertical multi-tube cyclone separator.
出处
《化工机械》
CAS
2015年第2期225-229,共5页
Chemical Engineering & Machinery
基金
国家自然科学基金资助项目(21106181)
中国石油大学(北京)基金资助项目(KYJJ2012-03-15)
关键词
立式多管旋风分离
窜流
返混
泄气率
数值模拟
vertical multi-tube cyclone separator
cross-flow
back-mixing
gas leakage rate
numerical simulation
