华中科技大学学报（自然科学版）Issue(2)：30-34,5.DOI:10.13245/j.hust.150207
高压直喷天然气发动机外特性燃烧及 NO x排放
Combustion and NOx emission characteristics of high pressure direct injection natural gas engine at full load
摘要
Abstract
In order to investigation the effect of engine speed on combustion characteristics and emis‐sion characteristics at full load ,indicator diagram and NOx emissions were measured on a turbo‐charged intercooled high‐pressure direct‐injection natural gas engine .The results indicate that in the w hole speed range at full load ,the heat release rate show s a trend of first rapid then slow and the peak value decreases with the increase of speed;more fuel is burned during the premixed combustion phase and each combustion phase is more distinguishable due to the longer ignition delay at lower engine speed ,w hen the speed is above 1 100 r/min ,the ignition delay is significantly shortened ,the propor‐tion of premixed combustion is reduced and mixing‐controlled combustion phase becomes the dominant combustion mode;NOx emissions increase with the speed when engine speed is lower than 900 r/min , decrease with speed in the speed range of 900 r/min to 1 600 r/min ,remain stable when the engine speed is above 1 600 r/min .关键词
天然气发动机/高压直喷/外特性/燃烧特性/排放特性Key words
natural gas engine/high-pressure direct-injection/full load/combustion characteristics/emission characteristics分类
能源科技引用本文复制引用
李孟涵,张强,李国祥,邵思东..高压直喷天然气发动机外特性燃烧及 NO x排放[J].华中科技大学学报（自然科学版）,2015,(2):30-34,5.基金项目
国家高技术研究发展计划资助项目（2060303）． （）
