第38卷第4期 2017年8月
内燃机工程
Chinese Internal Combustion Engine Engineering
文章编号：1000—0925(2017）04—0053—04
Vol. 38 No. 4 August. 2017
380076
双介质NTP反应器预氧化柴油机NO的试验研究
军，何涛，李超，唐炜，王兴华王
（江苏大学汽车与交通工程学院，镇江212013）
ExperimentalStudy onOxidation of NOfromDieselEngineby
Double-Dielectric NTP Reactor
WANG Jun,HE Tao,LI Chao,TANG Wei,WANG Xinghua
(School of Automotive and Traffic Engineering,Jiangsu University,Zhenjiang 212o13,China)
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), 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 o % engine load and with the same discharge frequency, the volume fraction of NO and the total NO, first decrease and then increase as the V,p increases; the volume fraction of NO, increase with the V,p+ among different discharge frequencies, there always exits a critical value of the Vp which can make the ratio of NO to NO, 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 NO, reach 1 : 1, which helps to speed SCR reaction, thus improving the conversion rate of NO, at low temperature.
摘要：建立双介质低温等离子体(NTP)反应器预氧化案油机NO台架试验系统，研究了放电电压峰峰值V=、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：2100r/min转速、0%负荷工况下，相同放电频率时，NO体积分数随V增大而先减小后增大，NO,体积分数随V增大而增大，NO,总量随V增大而先减小后增大；不同放电频率时均存在一个能使NO/NO：比例为1：1的V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，其中0%负荷和25%负荷时，NTP 能使NO/NO: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，提高案油机低温区间NO,的转化率，
关键调：柴油机：低温等离子体；氮氧化物：氧化
Key words: diesel engine; non-thermal plasma; NO,; oxidation D0l:10.13949/j.cnki.nrjgc.2017.04.009
中图分类号：TK423
收稿日期：2015-12-17
文献标识码：A
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全项目
(10JDG051)
Fund Project: National Natural Science Foundation of China (51306074) ; The Priority Academic Program Development of Jiangsu Higher Education
Institutions (PAPD) ; Research Foundation for Senior Professionals in Jiangsu University (10JDG051)
作者简介：王万方数据
军（1980—），男，副教授，博士，主要研究方向为发动机工作过程及排放控制研究，E-mail:qcwjun@ujs,edu,cn