摘要
利用CFD软件建立船用大缸径低压双燃料发动机模型,对双燃料发动机的工作过程进行仿真分析,重点研究了天然气喷射过程中缸内流场变动以及天然气喷阀几何结构对发动机性能的影响。结果表明:喷射角度的改变影响了缸内原本扫气形成的流场,进而影响混合气的形成,喷射角度越大,对流场的影响也越大。研究天然气喷射过程中缸内流场变动及天然气喷阀几何结构对发动机性能的影响,可以对双燃料发动机进行优化,提高发动机性能并降低排放。
Based on the theories of CFD,a model of large-bore low-pressure dual fuel marine engine is developed.Through the simulation and analysis of the operation process,the in-cylinder flow field during natural gas injection and the influence of natural gas injection valve geometry on engine performance are mainly studied.The result shows that the change of injection angle affects the flow field originally formed by scavenging and further affects the formation of gas mixture.The larger the injection angle,the greater the influence is on the flow field.Studying the variation of in-cylinder flow field and the influence of natural gas injection valve geometry on engine performance can optimize engine,improve engine performance and reduce emissions.
作者
白皆松
周松
郭浩
BAI Jiesong;ZHOU Song;GUO Hao(College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《船舶工程》
CSCD
北大核心
2019年第S1期162-164,169,共4页
Ship Engineering
基金
国家重点研发计划资助(2016YFC0205200)
国家自然科学基金项目(51379050)
高技术船舶科研计划——船用低速机工程(一期)研制项目
关键词
喷射条件
双燃料
燃烧
排放
injection conditions
dual fuel
combustion
emission
