摘要
将所有燃烧室部件(气缸盖-气缸套-活塞组-润滑油膜)作为一个耦合体,在对耦合体进行瞬态传热数值模拟的基础上,利用分区求解、边界耦合法建立缸内工作过程与燃烧室部件的耦合传热计算模型,从而实现缸内工作过程与燃烧室部件的耦合仿真模拟,以此考察燃烧室部件传热时间非均匀性对发动机性能的影响。结果表明:燃烧室部件表面的非均匀温度分布对常规金属柴油机的动力性、经济性和排放性能的影响十分微小,对传热性能有一定影响,但幅度也小于1%。因此在常规柴油机整体性能的准维模拟预测中,可以忽略燃烧室部件传热时间非均匀性的影响。
Combustion chamber components（i.e.cylinder head,cylinder liner,piston assembly,oil film） were treated as a coupled body.Based on the three-dimensional numerical simulation of heat transfer of the coupled body,a coupled calculation model for in-cylinder working process and the combustion chamber components was built up using domain decomposition and boundary coupling method to implement the coupled simulation of in-cylinder working process and the combustion chamber components.The model was applied to investigate the influence of the time non-uniformity in heat transfer among combustion chamber components on engine performance.The results show that it has little effect on engine power,fuel economy and emissions for normal metal built diesel engine,and it has certain effect on its heat transfer performance,however its amplitude is less than 1%.The time non-uniformity of surface temperature distribution may be ignored in the quasi-dimensional simulation of whole engine performance.
出处
《内燃机工程》
EI
CAS
CSCD
北大核心
2010年第6期27-31,37,共6页
Chinese Internal Combustion Engine Engineering
基金
国家自然科学基金资助项目(50576008和50876016)
辽宁省自然科学基金资助项目(20062180)
关键词
内燃机
柴油机
传热
时间非均匀性
性能
IC engine
diesel engine
heat transfer
time non-uniformity
performance
