江苏大学学报（自然科学版）2018，Vol.39Issue(1)：7-13,7.DOI:10.3969/j.issn.1671-7775.2018.01.002
不同喷油正时的柴油机PCCI燃烧过程数值模拟
Numerical simulation of PCCI combustion in diesel engine with different injection timing
摘要
Abstract
The combustion process in a single-cylinder turbocharged diesel engine with pilot-pilot-main injection strategy was simulated by the computational fluid dynamics ( CFD ) software .The effects of injection timing on combustion process , NO generation and soot were analyzed in detail .The results show that when the injection timing is retarded , the in-cylinder pressure is decreased gradually with reduced main heat release peak , and the position of heat release peak moves far away from the top dead center with increased premixed combustion fraction to show more apparent feature of low temperture PCCI combustion mode .For 10%heat release ( q10 ) with retarding of fuel injection timing , the soot generation is decreased as the lean premixed combustion takes the major , while more NO is generated due to the rapid heat release of premixed mixture .For 90% heat release ( q90 ) , NO emission is decreased due to the total low temperature effect in cylinder , while the soot is increased with latter decreasing due to the extended combustion space and the high premixed combustion fraction .The favorable tradeoff between NO and PM emissions can be well compromised in a diesel engine with the low temperature PCCI mode .关键词
预混充量压燃/多段喷射/喷油正时/数值模拟/排放Key words
premixed charge compression ignition ( PCCI)/multiple injection/injection timing/numerical simulation/emission分类
能源科技引用本文复制引用
梅德清,涂立志,雎志轩,姜士阳,王向丽,袁银男..不同喷油正时的柴油机PCCI燃烧过程数值模拟[J].江苏大学学报（自然科学版）,2018,39(1):7-13,7.基金项目
国家自然科学基金资助项目(51376095,51506101) （51376095,51506101）
江苏高校品牌专业建设工程资助项目(苏政办发[2014]82号) （苏政办发[2014]82号）
江苏省科技厅重点研发计划项目(BE2016139) （BE2016139）
