均质压燃
压缩比
热效率
活塞(光学)
燃烧
四冲程发动机
汽车工程
切姆金
内燃机
气门正时
点火系统
环境科学
工程类
机械工程
机械
燃烧室
化学
航空航天工程
物理
有机化学
光学
波前
作者
Shen Xu,Yang Wang,Tao Zhu,Tao Xu,Chengjun Tao
出处
期刊:Applied Energy
[Elsevier]
日期:2011-11-01
卷期号:88 (11): 3712-3725
被引量:37
标识
DOI:10.1016/j.apenergy.2011.05.002
摘要
An opposed-piston hydraulic free piston engine operating with homogenous charge compression ignition (HCCI) combustion, has been proposed by State Key Laboratory of Engines as a means of significantly improving the IC engine’s cycle thermal efficiency and lowering exhaust emissions. Single and multi-zone Chemkin model with detailed chemical kinetics, and unique piston dynamics extracted from one dimensional gas dynamic model, have been used to analyze the combustion characteristics and engine performance. Intake heating, variable compression ratio and internal EGR are utilized to control the combustion phasing and duration in the cycle simulations, revealing the critical factors and possible limits of performance improvement relative to conventional crank engines. Furthermore, real engine effects such as heat transfer with air swirl, residual mass fraction, thermal stratification, and heat loss fraction between zones are considered in the sequential CFD/multi-zone method to approach the realistic engine performance at an acceptable knock level.
科研通智能强力驱动
Strongly Powered by AbleSci AI