文档介绍：维普资讯
· 设计·计算-研究-
过量空气系数对天然气发动机燃烧及排放的影响木
窦慧莉刘忠长 1,2 李骏闫涛
(;)
【摘要】研究了过量空气系数( )对天然气发动机燃烧及排放的影响。研究结果表明,当h>,随着其不断加
大,滞燃期和主燃期变长。放热率降低,NO 排放减少,CO和 HC排放增多,发动机的热效率降低,比气耗加大;稀薄
燃烧天然气发动机的各个工况都存在最佳的过量空气系数值,在该值下,发动机的 NO、CO和 HC排放及比气耗都
较低,排气温度很低,发动机经济性和町靠性最佳。
主题词:天然气发动机过量空气系数稀薄燃烧排放
中图分类号: 文献标识码:A 文章编号:l000-3703(2006)03—0008—04
InfluenceofExcessive Air Coefficient bustion
AndEmission 0fNPG Engines
Dou Huili 1+2 LiuZhongchang Dou,Li1+2 Jun2,Yan HuiliTao
( University: ( R&D Center)
【Abstract]Study on influence of excessive air coefficient(A)bustion and emission of NPG engines was done. was NPG engines of emission bustion coefficient(A)on air excessive of influence on 【Abstract]Study
It is shown is It that。when >,bustion its laggingperiod bustion period e longer,ther—
mal discharge decreases,emission of NO decreases,emissions of CO and HC increasesthermal efficiency of engine de—
creases,specific gasconsumption increases:Each bustionof NPGengine has theoptimumCO- excessiveair
efficient,when reaches thevalue,emissions NOof ,CO,HC and gasspecific consumption,exhausting temperature are lower,
the engine the economyhastheoptimal fuel andreliability.
Key words:NPG engine,Excessive air coefficient,bustion,Emission
射方式。在第一缸气缸盖上安装压力传感器,用以测
1 前言
量缸内压力。在皮带轮上安装了 DELTER2613B角
随着石油资源危机和大气污染日益严重,天然标仪用