摘要
探讨了利用CHEMKIN4.1与FLUENT6.2软件耦合预测脉冲电晕放电条件下NO的净化过程.利用脉冲放电时间平均集合模型,计算出N2/O2在高能电子撞击下的离解速率常数,提出一套NO/O2/N2体系反应机理.结合CHEMKIN的敏感性分析方法对反应机理进行了分析,预测了活性自由基元(N、O)体积分数的变化趋势,获得了NOx在三维等离子反应器内的的体积分数分布.结果表明,耦合计算很好地解决了计算流体力学与复杂反应动力学机制结合的问题,脉冲电晕放电可以有效地脱除NO,O2体积分数的增加和较低反应温度均有利于NO的脱除.
The numerical simulation for the removal of NO under pulse corona discharge using CHEMKIN4.1 coupled with FLUENT6.2 software was discussed. The reaction rate constant of the ionization of N2/O2 by electronimpact dissociation was calculated by the lumped kinetic model of pulse corona discharge, and a kinetic model in the system of NO/O2/N2 under pulse corona discharge was obtained. The kinetic mechanism was analyzed by the sensitivity analysis method in CHEMK1N. The concentrations of free radicals （N, O）were predicted and the threedimensional concentration distribution of NOx in plasma reactor was also obtained. The results show that coupling calculation can solve the problem of the combination of the computation fluid dynamics （CFD）and the complex kinetic mechanism, that pulse corona discharge can effectively removes nitric oxide, and that 02 fraction and low temperature are helpful for the removal of NO.
出处
《燃烧科学与技术》
EI
CAS
CSCD
北大核心
2011年第4期368-374,共7页
Journal of Combustion Science and Technology
基金
国家自然科学基金资助项目(50976049)
关键词
NO脱除
化学动力学
耦合
计算流体力学
等离子
NO removal
chemical kinetic
coupling
computation fluid dynamics （CFD）
plasma
