王军，何涛，李超，唐炜，王兴华.双介质NTP反应器预氧化柴油机NO的试验研究[J].内燃机工程,2017,38(4):53-56.
双介质NTP反应器预氧化柴油机NO的试验研究
Experimental Study on Oxidation of NO from Diesel Engine by Double-Dielectric NTP Reactor
DOI：
关键词:柴油机  低温等离子体  氮氧化物  氧化
Key Words:diesel engine  non-thermal plasma  NOx  oxidation
基金项目:国家自然科学基金项目（51306074）；江苏高校优势学科建设工程资助项目（PAPD）；江苏大学高级专业人才科研启动基金项目（10JDG051）
作者单位
王军，何涛，李超，唐炜，王兴华 江苏大学 汽车与交通工程学院，镇江 212013 
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摘要:建立双介质低温等离子体（NTP）反应器预氧化柴油机NO台架试验系统，研究了放电电压峰峰值Vp-p、放电频率、排气流量及负荷对NTP预氧化NO性能的影响。试验结果表明：2100r/min转速、0%负荷工况下，相同放电频率时，NO体积分数随Vp-p增大而先减小后增大，NO2体积分数随Vp-p增大而增大，NOx总量随Vp-p增大而先减小后增大；不同放电频率时均存在一个能使NO/NO2比例为1∶1的Vp-p临界值点。排气流量对NTP氧化NO性能影响不大。随着负荷的增大，NTP氧化NO的能力逐渐减弱，其中0%负荷和25%负荷时，NTP能使NO/NO2比例达到1∶1，协同选择性催化还原（SCR）系统可实现快速SCR反应，提高柴油机低温区间NOx的转化率。
Abstract:A test system using a reactor of double-dielectric non-thermal plasma（NTP） to pre-oxidize NO from diesel engine was established. The effects of discharge peak to peak voltage（Vp-p）, discharge frequency, exhaust flow and engine load on the performance of NTP′s pre-oxidizing NO were studied. The results show that, under the working condition of 2 100 r/min engine speed and 0% engine load and with the same discharge frequency, the volume fraction of NO and the total NOx first decrease and then increase as the Vp-p increases; the volume fraction of NO2 increase with the Vp-p; among different discharge frequencies, there always exits a critical value of the Vp-p which can make the ratio of NO to NO2 be 1∶1. The exhaust flow has insignificant effect on the performance of NTP′s pre-oxidizing NO. The NTP ability to pre-oxidize NO weakens gradually with the increase of engine load. When the engine load is 0% and 25%, NTP can make the ratio of NO to NO2 reach 1∶1, which helps to speed SCR reaction, thus improving the conversion rate of NOxat low temperature.
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