线管式NTP反应器降低柴油机PM排放的研究

设计了一种线管式低温等离子体反应器,对该反应器的工作特性进行了试验研究及理论分析,并采用该反应器进行了降低柴油机排气PM的台架试验。研究结果表明,线管式低温等离子体反应器存在两种不同的放电形式,介质阻挡电晕放电和介质阻挡丝状放电,其放电形貌与工作特性显著不同。两种放电形式均可降低柴油机PM排放;介质阻挡丝状放电较介质阻挡电晕放电对PM的处理效果更好,能量利用效率也更高。当反应器放电形式为介质阻挡电晕放电时,反应器中同时存在对PM氧化分解的化学过程和对PM荷电捕集的物理过程。

Wire-tube NTP Reactor for Reducing Diesel Engine PM Emission

A wire-tube non-thermal plasma reactor was designed and its working characteristics were analyzed and studied by the theory and experiment.The experiment for reducing diesel engine PM emission was carried out on the reactor.The result shows that the wire-tube non-thermal plasma reactor has two different discharge types of dielectric barrier corona discharge and dielectric barrier filamentary discharge,which have different discharge appearance and working characteristics.Both discharge types can reduce PM emission of diesel engine,but dielectric barrier filamentary discharge is more effective and has higher energy utilization efficiency.When dielectric barrier corona discharge works,there exist two different processes simultaneously,the chemical process of PM oxidized decomposition and the physical process of PM charged trapping.