柴油机燃用柴油—碳酸二甲酯(DMC)混合燃料时缸内辐射传热的变化  

Investigation on Emissions and Thermal Load of a Diesel Fueled with DMC-Diesel Blended Fuel

作　　者：石科峰[1] 潘克煜[1] 李建国[1] 姚波[1] 沈若愚[1] 

机构地区：[1]西安交通大学汽车系,陕西西安710049

出　　处：《内燃机学报》2004年第3期221-226,共6页Transactions of Csice

基　　金：福特-中国研究发展基金资助项目(50122166);陕西省科委计划资助项目(2000K11 G3)。

摘　　要：研究了柴油机燃用柴油—DMC混合燃料后由于碳粒生成量减少而引起的缸内辐射传热量的变化以及发动机尾气烟度的变化。结果表明,添加DMC后排气烟度能够得到显著改善,并且存在一个最佳添加比例;同时随着添加比例的提高,缸内辐射传热量有所降低;对比尾气烟度和缸内辐射传热量,可以得到碳烟的生成量与缸内辐射传热量呈正比关系。As an oxygenate additive, dimethyl carbonate (DMC) can remarkably decrease smoke of diesel engines. This paper investigated the variations of thermal radiant flux due to the reduction of smoke when a diesel engine fueled with DMC-diesel blends and the variation of the engine exhaust smoke. The results showed that exhaust smoke decreased blending remarkably when DMC added in diesel fuel and there existed an optimal percentage, thermal radiant flux in the cylinder decreased gradually with the increase of DMC fraction in the blends, there is a direct proportion relation between the exhaust smoke and thermal radiant flux.

关 键 词：柴油机 混合燃料 辐射传感器 辐射传热 柴油-碳酸二甲酯 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程]