LPG/柴油混合燃料喷雾液滴尺寸分布的数值模拟  

Numerical simulation of droplet size distribution for LPG/diesel dual fuel in sprays

作　　者：曹建明[1] 何建[1] 

机构地区：[1]长安大学汽车学院,陕西西安710064

出　　处：《长安大学学报（自然科学版）》2008年第3期84-87,共4页Journal of Chang’an University(Natural Science Edition)

基　　金：陕西省自然科学基金项目(99C07)

摘　　要：运用最大熵原理和质量守恒定律,推导出混合燃料喷雾液滴尺寸分布函数,建立了柴油和LPG/柴油混合燃料的喷雾液滴尺寸分布模型,对纯柴油、LPG与柴油质量掺混比为30%的L30混合燃料进行了模拟计算,并与试验结果进行了对比分析。结果表明:由于LPG的闪急沸腾效应,LPG/柴油混合燃料的喷雾液滴尺寸分布相对于柴油的尺寸分布向小颗粒方向偏移;计算数据与试验数据拟合很好,柴油中溶入LPG有助于改善雾化质量。Diesel and LPG/diesel droplet size distribution model in sprays are established by using droplet size distribution function based on the maximum entropy principle and the mass conservation law. The model is computed with numerical simulations for pure diesel and L30 （the mass ratio of LPG to diesel is 30%）, the calculated results are compared with the experimental datum. The results show that： because of the influence of flash boiling injection, the droplet size distribution curves of L30 move towards smaller diameters compared with those of diesel; a good agreement is obtained between numerical and experimental results; the diesel mixed with LPG will improve the spray quality. 4 figs, 15 refs.

关 键 词：动力工程 LPG/柴油 喷雾 闪急沸腾效应 液滴尺寸分布 数值模拟 

分 类 号：U461[机械工程—车辆工程] TK421[交通运输工程—载运工具运用工程]