生物柴油缸内喷雾特性的数值模拟  

Numerical Simulation of Spray Characteristics of Bio-Diesel Fuel in Cylinder

作　　者：王忠[1] 毛功平[1] 袁银男[1] 杨殿勇[1] 顾士强[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《内燃机工程》2009年第3期6-11,共6页Chinese Internal Combustion Engine Engineering

基　　金：国家自然科学基金项目(50376021;50776042);江苏省普通高校研究生科研创新计划资助项目(CX07B_092z);江苏省"青蓝工程"资助项目

摘　　要：采用数值模拟的方法研究了4102Q柴油机燃用生物柴油的喷雾特性,探讨了喷孔结构参数、针阀开启压力、生物柴油的掺混比、发动机转速、负荷和燃油温度对喷雾的贯穿距离和索特平均直径的影响规律,并与柴油进行比较,对计算精度进行了分析。研究结果表明:2种燃料的喷雾特性随上述因素的变化规律基本一致;生物柴油-柴油混合燃料的贯穿距离和索特平均直径均随生物柴油掺混比的增大而增大;相同因素条件下,生物柴油的贯穿距离和索特平均直径均大于柴油;2种燃料喷雾特性的差别是由其不同的理化特性引起的,密度和黏度是主要因素;数值模拟的精度是足够的。The spray characteristics of bio-diesel fuel were researched by numerical simulation. The effects of the nozzle hole diameter, the nozzle opening pressure, the bio-diesel fuel proportion, the engine load, the engine speed, and the fuel temperature on the maximum penetration （MP） and SMD of bio-diesel fuel were discussed, when the engine was fuelled with bio-diesel fuel and diesel fuel. The results show that changing trends of MP and SMD of two fuels are similar; MP and SMD of bio-diesel/diesel fuel blend increase with the increase of proportion of bio- diesel in the blend fuel; at the same condition, MP and SMD of bio-diesel fuel are greater than that of diesel fuel. The difference of spray characteristics is resulted from different physicochemical property （it is mainly density and viscosity） of two fuels. The numerical simulation has enough accuracy.

关 键 词：内燃机 生物柴油 喷雾特性 柴油机 数值模拟 

分 类 号：TK464[动力工程及工程热物理—动力机械及工程]