一种含氧混合燃料喷雾特性的试验研究  

Experimental Study on the Spray Characteristics of an Oxygenated Blends

作　　者：孙志新[1] 王宪成[1] 王建昕[2] 何旭[2] 

机构地区：[1]装甲兵工程学院机械工程系,北京100072 [2]清华大学汽车安全与节能国家重点实验室,北京100084

出　　处：《装甲兵工程学院学报》2011年第2期31-36,共6页Journal of Academy of Armored Force Engineering

基　　金：清华大学汽车安全与节能国家重点实验室开放基金项目(KF09091)

摘　　要：针对柴油和所需的油料方案B20D10（即在柴油中掺混20%生物柴油和10%碳酸二甲酯,Dimethyl-Carbonate,DMC）,在某型重型车辆柴油机高压泵试验台上,采用定容弹和高速摄影技术,研究了掺混生物柴油和DMC后对燃油喷雾特性的影响。结果表明：在不同的背景压力下,燃料B20D10油束的贯穿距离低于柴油,最大降幅达到7.0%,锥角最大增加约15.2%;在非破碎阶段,燃料的贯穿距离与时间呈正比关系;在破碎阶段,贯穿距离与时间的关系为s∝tn,其中n约为0.57。试验结果为建立该混合燃料的喷雾模型,并进行缸内燃烧的数值模拟奠定了基础。In allusion to the diesel and the required fuel project B20D10（diesel blended with 20 biodiesel and 10%DMC,Dimethyl-Carbonate）,on a testing bench of a high-pressure pump of a heavy-duty vehicle engine,a constant volume container and high-speed photographic technology are utilized to study the influence of blends of biodiesel and DMC on the fuel spray characteristics.Experimental results show that the penetration of B20D10 is about 7% shorter than that of diesel,cone angle increases by about 15.2%.In non-broken period,the penetration of B20D10 is in direct proportion to time,while in broken period it′s in direct proportion to tn,while n is about 0.57.The test results lay foundation for the establishment of the spray model and simulation of the combustion process in the cylinder.

关 键 词：生物柴油 柴油机 喷雾特性 锥角 贯穿距离 

分 类 号：TK428.9[动力工程及工程热物理—动力机械及工程] TQ517.2[化学工程]