摘要
二甲醚(DME)是一种能从煤、天然气和生物质中制取的燃料,能够实现发动机超低排放。本文以二甲醚为燃料,改变压缩比,对微型HCCI自由活塞式动力装置进行了单次冲击的可视化试验,采用高速数码相机拍摄燃烧过程,且首次开发了微燃烧室内部压力测试及分析系统。通过可视化试验研究,得出了压缩比等关键参数对微动力装置内燃烧特性的影响规律,获得了本文工况下微动力装置压缩着火的临界状态条件,并且通过燃烧压力测试及分析系统首次得到了微燃烧室内部燃烧压力曲线。本文试验研究结果为揭示微动力装置微压缩燃烧规律,以及为微动力系统的设计提供了一定的理论依据。
The DME fuel can be made from coal,natural gas and biomass.With it the emissions of engine can be very lower.In this paper,DME is the fuel.By changing the compression ratio,a single visual impact test of micro HCCI free-piston engine is done,and the entire combustion process is recorded by high-speed digital camera.At the same time,the first internal pressure testing and analysis system of the micro combustor is developed.Through visualizing experimental research,some important conclusions are drawn,such as,the influence of the Compression ratio of micro free-piston to the combustion characteristics.The critical state of micro-compression ignition combustion is got.And combustion pressure curve of micro combustor is first got through combustion pressure testing and analysis system.The experimental results reveal the law of micro-compression combustion,and provide the theoretical basis for the design of the micro-power system.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2014年第4期814-818,共5页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51076060)
