煤炭转化2017，Vol.40Issue(4)：74-80,7.
布置均流装置的烟道烟气三维流场模拟
Numerical Simulation of Three-dimensional Gas Flow in Boiler Tail Flue with Flow-equalizing Equipment
摘要
Abstract
To improve the flue gas field,a uniform flow-equalizing equipment was devisedand used.Then,numerical investigation was carried out to simulate the two phase flow of flue gas,in which the gas was considered as continuous phase and described by k-e RNG turbulence model,and the flying ash was treated as dispersed phase and described by discrete phase model.The gas and flying ash was interacted by two-way coupling.The waste heat recovery device was simplified as porous media model.The design of the flow-equalizing equipment and the flue were evaluated and analysed according to the pressure,velocity distribution and velocity non-uniform coefficient.The results show that the velocity non-uniform coefficient is close to 1,the velocity is around 2.4 m/s and the pressure drop of the tail flue is 700 pa,which indicate that the flowequalizing equipment improves the gas field in the waste heat recovery device and its exit.关键词
尾部烟道/三维流场/均流装置/数值模拟/速度不均匀系数Key words
boiler trail flue/three-dimensional gas flow/flow-equalizing equipment/numerical simulation/velocity non-uniform coefficient分类
机械制造引用本文复制引用
常建忠,刘汉涛,尉庆国..布置均流装置的烟道烟气三维流场模拟[J].煤炭转化,2017,40(4):74-80,7.基金项目
国家自然科学基金资助项目(51476150)和中国博士后科学基金资助项目(2016M590215). （51476150）
